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id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Shell keep</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. 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class="mw-file-description"><img alt="An aerial photograph of Windsor Castle, with three walled areas clearly visible, stretching left to right. Straight roads stretch away in the bottom right of the photograph, and a built-up urban area can be seen outside the castle on the left." src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b2/Windsor_Castle_from_the_Air_wideangle.jpg/300px-Windsor_Castle_from_the_Air_wideangle.jpg" decoding="async" width="300" height="144" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b2/Windsor_Castle_from_the_Air_wideangle.jpg/450px-Windsor_Castle_from_the_Air_wideangle.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b2/Windsor_Castle_from_the_Air_wideangle.jpg/600px-Windsor_Castle_from_the_Air_wideangle.jpg 2x" data-file-width="1600" data-file-height="766" /></a><figcaption>An aerial view of <a href="/wiki/Windsor_Castle" title="Windsor Castle">Windsor Castle</a> with its shell keep (called "The Round Tower") prominent on its <a href="/wiki/Motte" class="mw-redirect" title="Motte">motte</a> inside the middle ward (middle bailey)</figcaption></figure> <p>A <b>shell keep</b> is a style of <a href="/wiki/Medieval" class="mw-redirect" title="Medieval">medieval</a> <a href="/wiki/Fortification" title="Fortification">fortification</a>, best described as a stone structure circling the top of a <a href="/wiki/Motte-and-bailey" class="mw-redirect" title="Motte-and-bailey">motte</a>. </p><p>In English <a href="/wiki/Castle" title="Castle">castle</a> morphology, shell <a href="/wiki/Keep" title="Keep">keeps</a> are perceived as the successors to <a href="/wiki/Motte-and-bailey" class="mw-redirect" title="Motte-and-bailey">motte-and-bailey</a> castles, with the wooden fence around the top of the motte replaced by a stone wall. Castle engineers during the <a href="/wiki/History_of_England#Norman_England" title="History of England">Norman</a> period did not trust the motte to support the enormous weight of a stone keep. A common solution to this problem was to replace the <a href="/wiki/Palisade" title="Palisade">palisade</a> with a stone wall and then build wooden buildings backing onto the inside of the wall. This construction was lighter than a keep and prevented the walls from being <a href="/wiki/Mining_(military)" class="mw-redirect" title="Mining (military)">undermined</a>, meaning they could be thinner and lighter. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Examples">Examples</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Shell_keep&action=edit&section=1" title="Edit section: Examples"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A gazetteer compiled by archaeologist Robert Higham counted 21 shell keeps in England and Wales.<sup id="cite_ref-FOOTNOTEHigham201663_1-0" class="reference"><a href="#cite_note-FOOTNOTEHigham201663-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Examples include the Round Tower at <a href="/wiki/Windsor_Castle" title="Windsor Castle">Windsor Castle</a><sup id="cite_ref-FOOTNOTEPettifer20027_2-0" class="reference"><a href="#cite_note-FOOTNOTEPettifer20027-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-FOOTNOTEDarvillStamperTimby2002196_3-0" class="reference"><a href="#cite_note-FOOTNOTEDarvillStamperTimby2002196-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> and the majority were built in the 11th and 12th centuries.<sup id="cite_ref-FOOTNOTEHislop201396_4-0" class="reference"><a href="#cite_note-FOOTNOTEHislop201396-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>Surviving English examples of shell keeps include: </p> <ul><li><a href="/wiki/Arundel_Castle" title="Arundel Castle">Arundel</a>, West Sussex (re-modelled post-medieval)</li> <li><a href="/wiki/Berkhamsted_Castle" title="Berkhamsted Castle">Berkhamsted</a>, Hertfordshire</li> <li><a href="/wiki/Carisbrooke_Castle" title="Carisbrooke Castle">Carisbrooke</a>, Isle of Wight</li> <li><a href="/wiki/Castle_Acre_Castle_and_town_walls" title="Castle Acre Castle and town walls">Castle Acre</a>, Norfolk (shell keep around an inner tower or manor House)</li> <li><a href="/wiki/Clare_Castle" title="Clare Castle">Clare</a>, Suffolk (part of wall on motte only)</li> <li><a href="/wiki/Fotheringhay_Castle" title="Fotheringhay Castle">Fotheringhay</a>, Northamptonshire (demolished - motte only survives)</li> <li><a href="/wiki/Launceston_Castle" title="Launceston Castle">Launceston</a>, Cornwall</li> <li><a href="/wiki/Lewes_Castle" title="Lewes Castle">Lewes</a>, East Sussex – two shell keeps on same site? One survives.</li> <li>Lincoln, Lincolnshire – two shell keeps on same site? One survives.</li> <li>Oxford, Oxfordshire</li> <li><a href="/wiki/Pickering_Castle" title="Pickering Castle">Pickering</a>, North Yorkshire</li> <li><a href="/wiki/Restormel_Castle" title="Restormel Castle">Restormel</a>, Cornwall (excellent example)</li> <li><a href="/wiki/Tamworth_Castle" title="Tamworth Castle">Tamworth</a>, Staffordshire</li> <li><a href="/wiki/Tonbridge_Castle" title="Tonbridge Castle">Tonbridge</a>, Kent (foundations on motte only)</li> <li><a href="/wiki/Totnes_Castle" title="Totnes Castle">Totnes</a>, Devon</li> <li><a href="/wiki/Trematon_Castle" title="Trematon Castle">Trematon</a>, Cornwall</li> <li><a href="/wiki/Warwick_Castle" title="Warwick Castle">Warwick</a>, shell demolished and incorporated into bailey wall post-medieval</li> <li><a href="/wiki/Wigmore_Castle" title="Wigmore Castle">Wigmore</a>, Herefordshire</li> <li><a href="/wiki/Windsor_Castle" title="Windsor Castle">Windsor</a>, Berkshire (re-modelled post-medieval)</li> <li><a href="/wiki/Wiston_Castle" title="Wiston Castle">Wiston</a> (Wales)</li></ul> <p>In addition <a href="/wiki/Farnham_Castle" title="Farnham Castle">Farnham</a> and <a href="/wiki/Berkeley_Castle" title="Berkeley Castle">Berkeley</a> castles have stone enclosed mottes which may be interpreted as shell keep variations. At other sites such as Durham, Warkworth, Clifford's Tower (York) and Sandal (Wakefield), shell keeps may have evolved into a tower proper. Clifford's Tower is often interpreted by modern visitors as a shell keep due to explosion damage, in 1684, which removed the roof and its central supporting masonry. True shell keeps were a stone wall around the upper perimeter of the motte with lean-to buildings against this outer wall and a small courtyard in the middle. See Restormel plan below. </p><p>Unusually Lewes and Lincoln castles both feature two separate mottes which may have had shell keeps upon both of them. The reason for this is unclear but given that Lincoln Castle is adjacent to the cathedral, one shell keep may have been for the castellan (castle holder) and the other for the bishop. In each case, only one shell keep survives. </p> <div class="mw-heading mw-heading2"><h2 id="Gallery">Gallery</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Shell_keep&action=edit&section=2" title="Edit section: Gallery"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul class="gallery mw-gallery-traditional center"> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Windsor_Castle_Round_Tower.JPG" class="mw-file-description" title="The shell keep of Windsor Castle was built by Henry II and remodelled in the 19th century."><img alt="The shell keep of Windsor Castle was built by Henry II and remodelled in the 19th century." src="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/Windsor_Castle_Round_Tower.JPG/120px-Windsor_Castle_Round_Tower.JPG" decoding="async" width="120" height="90" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/56/Windsor_Castle_Round_Tower.JPG/250px-Windsor_Castle_Round_Tower.JPG 1.5x" data-file-width="4000" data-file-height="3000" /></a></span></div> <div class="gallerytext">The shell keep of Windsor Castle was built by <a href="/wiki/Henry_II_of_England" title="Henry II of England">Henry II</a> and remodelled in the 19th century.</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:RestormelCastle.JPG" class="mw-file-description" title="Restormel Castle built around the motte"><img alt="Restormel Castle built around the motte" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c9/RestormelCastle.JPG/120px-RestormelCastle.JPG" decoding="async" width="120" height="90" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c9/RestormelCastle.JPG/250px-RestormelCastle.JPG 1.5x" data-file-width="2592" data-file-height="1944" /></a></span></div> <div class="gallerytext"><a href="/wiki/Restormel_Castle" title="Restormel Castle">Restormel Castle</a> built around the motte</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Restormel_Castle_keep_plan_-_labelled.png" class="mw-file-description" title="Plan of Restormel Castle"><img alt="Plan of Restormel Castle" src="//upload.wikimedia.org/wikipedia/commons/thumb/0/0e/Restormel_Castle_keep_plan_-_labelled.png/120px-Restormel_Castle_keep_plan_-_labelled.png" decoding="async" width="120" height="115" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/0e/Restormel_Castle_keep_plan_-_labelled.png/180px-Restormel_Castle_keep_plan_-_labelled.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/0e/Restormel_Castle_keep_plan_-_labelled.png/240px-Restormel_Castle_keep_plan_-_labelled.png 2x" data-file-width="713" data-file-height="681" /></a></span></div> <div class="gallerytext">Plan of Restormel Castle</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Tamworth_Castle_-_geograph.org.uk_-_343714.jpg" class="mw-file-description" title="Tamworth Castle, Staffordshire"><img alt="Tamworth Castle, Staffordshire" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Tamworth_Castle_-_geograph.org.uk_-_343714.jpg/120px-Tamworth_Castle_-_geograph.org.uk_-_343714.jpg" decoding="async" width="120" height="90" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Tamworth_Castle_-_geograph.org.uk_-_343714.jpg/180px-Tamworth_Castle_-_geograph.org.uk_-_343714.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Tamworth_Castle_-_geograph.org.uk_-_343714.jpg/240px-Tamworth_Castle_-_geograph.org.uk_-_343714.jpg 2x" data-file-width="640" data-file-height="480" /></a></span></div> <div class="gallerytext"><a href="/wiki/Tamworth_Castle" title="Tamworth Castle">Tamworth Castle</a>, Staffordshire</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Totnes_Castle_20181026-02.jpg" class="mw-file-description" title="Totnes Castle, Devon"><img alt="Totnes Castle, Devon" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b3/Totnes_Castle_20181026-02.jpg/120px-Totnes_Castle_20181026-02.jpg" decoding="async" width="120" height="80" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b3/Totnes_Castle_20181026-02.jpg/180px-Totnes_Castle_20181026-02.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b3/Totnes_Castle_20181026-02.jpg/240px-Totnes_Castle_20181026-02.jpg 2x" data-file-width="4104" data-file-height="2736" /></a></span></div> <div class="gallerytext"><a href="/wiki/Totnes_Castle" title="Totnes Castle">Totnes Castle</a>, Devon</div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:Wiston_Castle_(4077887299).jpg" class="mw-file-description" title="Wiston Castle, Pembrokeshire"><img alt="Wiston Castle, Pembrokeshire" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/74/Wiston_Castle_%284077887299%29.jpg/120px-Wiston_Castle_%284077887299%29.jpg" decoding="async" width="120" height="80" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/74/Wiston_Castle_%284077887299%29.jpg/250px-Wiston_Castle_%284077887299%29.jpg 1.5x" data-file-width="3008" data-file-height="2000" /></a></span></div> <div class="gallerytext"><a href="/wiki/Wiston_Castle" title="Wiston Castle">Wiston Castle</a>, Pembrokeshire</div> </li> </ul> <div class="mw-heading mw-heading2"><h2 id="Citations">Citations</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Shell_keep&action=edit&section=3" title="Edit section: Citations"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-FOOTNOTEHigham201663-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-FOOTNOTEHigham201663_1-0">^</a></b></span> <span class="reference-text"><a href="#CITEREFHigham2016">Higham 2016</a>, p. 63.</span> </li> <li id="cite_note-FOOTNOTEPettifer20027-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-FOOTNOTEPettifer20027_2-0">^</a></b></span> <span class="reference-text"><a href="#CITEREFPettifer2002">Pettifer 2002</a>, p. 7.</span> </li> <li id="cite_note-FOOTNOTEDarvillStamperTimby2002196-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-FOOTNOTEDarvillStamperTimby2002196_3-0">^</a></b></span> <span class="reference-text"><a href="#CITEREFDarvillStamperTimby2002">Darvill, Stamper & Timby 2002</a>, p. 196.</span> </li> <li id="cite_note-FOOTNOTEHislop201396-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-FOOTNOTEHislop201396_4-0">^</a></b></span> <span class="reference-text"><a href="#CITEREFHislop2013">Hislop 2013</a>, p. 96.</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="General_and_cited_references">General and cited references</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Shell_keep&action=edit&section=4" title="Edit section: General and cited references"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFDarvillStamperTimby2002" class="citation book cs1">Darvill, Timothy; Stamper, Paul; Timby, Jane (2002). <i>England: an Oxford archaeological guide to sites from earliest times to AD 1600</i> (illustrated ed.). Oxford University Press. p. <a rel="nofollow" class="external text" href="https://books.google.com/books?id=3tMrajZuWR0C&pg=PA163">196</a>. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-19-284101-7" title="Special:BookSources/0-19-284101-7"><bdi>0-19-284101-7</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=England%3A+an+Oxford+archaeological+guide+to+sites+from+earliest+times+to+AD+1600&rft.pages=196&rft.edition=illustrated&rft.pub=Oxford+University+Press&rft.date=2002&rft.isbn=0-19-284101-7&rft.aulast=Darvill&rft.aufirst=Timothy&rft.au=Stamper%2C+Paul&rft.au=Timby%2C+Jane&rfr_id=info%3Asid%2Fen.wikipedia.org%3AShell+keep" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFHigham2016" class="citation web cs1">Higham, Robert (2016). <a rel="nofollow" class="external text" href="http://www.castlestudiesgroup.org.uk/Shell%20Keeps-Essay-low-resRev22a.pdf">"Shell-keeps revisited: the bailey on the motte?"</a> <span class="cs1-format">(PDF)</span>. Castle Studies Group.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Shell-keeps+revisited%3A+the+bailey+on+the+motte%3F&rft.pub=Castle+Studies+Group&rft.date=2016&rft.aulast=Higham&rft.aufirst=Robert&rft_id=http%3A%2F%2Fwww.castlestudiesgroup.org.uk%2FShell%2520Keeps-Essay-low-resRev22a.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AShell+keep" class="Z3988"></span> <span style="position:relative; top: -2px;"><span typeof="mw:File"><a href="/wiki/Open_access" title="open access publication – free to read"><img alt="Open access icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/77/Open_Access_logo_PLoS_transparent.svg/20px-Open_Access_logo_PLoS_transparent.svg.png" decoding="async" width="9" height="14" class="mw-file-element" data-file-width="640" data-file-height="1000" /></a></span></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFHislop2013" class="citation book cs1">Hislop, Malcolm (2013). <i>How to read castles</i>. London: Bloomsbury Academic. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/9781472521613" title="Special:BookSources/9781472521613"><bdi>9781472521613</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=How+to+read+castles&rft.place=London&rft.pub=Bloomsbury+Academic&rft.date=2013&rft.isbn=9781472521613&rft.aulast=Hislop&rft.aufirst=Malcolm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AShell+keep" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFPettifer2002" class="citation book cs1">Pettifer, Adrian (2002). <i>English Castles: A Guide by Counties</i> (Illustrated ed.). Boydell & Brewer. p. <a rel="nofollow" class="external text" href="https://books.google.com/books?id=47iheRUGKIEC&pg=PA7">7</a>. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-85115-782-3" title="Special:BookSources/0-85115-782-3"><bdi>0-85115-782-3</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=English+Castles%3A+A+Guide+by+Counties&rft.pages=7&rft.edition=Illustrated&rft.pub=Boydell+%26+Brewer&rft.date=2002&rft.isbn=0-85115-782-3&rft.aulast=Pettifer&rft.aufirst=Adrian&rfr_id=info%3Asid%2Fen.wikipedia.org%3AShell+keep" class="Z3988"></span></li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist 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wall">Chengqiang</a></i></span></li> <li><a href="/wiki/Circular_rampart" title="Circular rampart">Circular rampart</a></li> <li><a href="/wiki/City_gate" title="City gate">City gate</a></li> <li><a href="/wiki/Crannog" title="Crannog">Crannog</a></li> <li><a href="/wiki/Ditch_(fortification)" title="Ditch (fortification)">Ditch</a></li> <li><a href="/wiki/Defensive_wall" title="Defensive wall">Defensive wall</a></li> <li><a href="/wiki/Dun_(fortification)" title="Dun (fortification)">Dun</a></li> <li><a href="/wiki/Faussebraye" title="Faussebraye">Faussebraye</a></li> <li><a href="/wiki/Gatehouse" title="Gatehouse">Gatehouse</a></li> <li><a href="/wiki/Gord_(archaeology)" title="Gord (archaeology)">Gord</a></li> <li><a href="/wiki/Hillfort" title="Hillfort">Hillfort</a></li> <li><a href="/wiki/Landwehr_(border)" title="Landwehr (border)">Landwehr</a></li> <li><span title="Latin-language text"><i lang="la"><a href="/wiki/Limes_(Roman_Empire)" title="Limes (Roman Empire)">Limes</a></i></span></li> <li><a href="/wiki/Nuraghe" title="Nuraghe">Nuraghe</a></li> <li><span title="Latin-language text"><i lang="la"><a href="/wiki/Oppidum" title="Oppidum">Oppidum</a></i></span></li> <li><a href="/wiki/Palisade" title="Palisade">Palisade</a></li> <li><a href="/wiki/Pincer_gate" title="Pincer gate">Pincer gate</a></li> <li><a href="/wiki/Promontory_fort" title="Promontory fort">Promontory fort</a></li> <li><a href="/wiki/Rampart_(fortification)" title="Rampart (fortification)">Rampart</a></li> <li><a href="/wiki/Ringfort" title="Ringfort">Ringfort</a> (Rath)</li> <li><a href="/wiki/Refuge_castle" title="Refuge castle">Refuge castle</a></li> <li><span title="German-language text"><i lang="de"><a href="/wiki/Schwedenschanze" title="Schwedenschanze">Schwedenschanze</a></i></span></li> <li><a href="/wiki/Stockade" title="Stockade">Stockade</a></li> <li><span title="Latin-language text"><i lang="la"><a href="/wiki/Sudis_(stake)" title="Sudis (stake)">Sudis</a></i></span></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Trou_de_loup" title="Trou de loup">Trou de loup</a></i></span></li> <li><span title="Latin-language text"><i lang="la"><a href="/wiki/Vallum" title="Vallum">Vallum</a></i></span></li> <li><a href="/wiki/Wagon_fort" title="Wagon fort">Wagon fort</a> (<span title="Afrikaans-language text"><i lang="af">Laager</i></span>)</li> <li><a href="/wiki/Vitrified_fort" title="Vitrified fort">Vitrified fort</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Medieval_fortification" title="Medieval fortification">Post-classical</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Advanced_work" title="Advanced work">Advanced work</a></li> <li><a href="/wiki/Albarrana_tower" title="Albarrana tower">Albarrana tower</a></li> <li><a href="/wiki/Alcazaba" class="mw-redirect" title="Alcazaba">Alcazaba</a></li> <li><span title="Spanish-language text"><i lang="es"><a href="/wiki/Alc%C3%A1zar" title="Alcázar">Alcázar</a></i></span></li> <li><a href="/wiki/Amba_(landform)" title="Amba (landform)">Amba</a></li> <li><a href="/wiki/Arrowslit" title="Arrowslit">Arrowslit</a></li> <li><a href="/wiki/Barbican" title="Barbican">Barbican</a></li> <li><a href="/wiki/Bartizan" title="Bartizan">Bartizan</a></li> <li><a href="/wiki/Bastion" title="Bastion">Bastion</a></li> <li><a href="/wiki/Battery_tower" title="Battery tower">Battery tower</a></li> <li><a href="/wiki/Battlement" title="Battlement">Battlement</a></li> <li><a href="/wiki/Bawn" title="Bawn">Bawn</a></li> <li><a href="/wiki/Bent_entrance" title="Bent entrance">Bent entrance</a></li> <li><span title="German-language text"><i lang="de"><a href="/wiki/Bergfried" title="Bergfried">Bergfried</a></i></span></li> <li><span title="German-language text"><i lang="de"><a href="/wiki/Berm" title="Berm">Berm</a></i></span></li> <li><a href="/wiki/Boom_(navigational_barrier)" title="Boom (navigational barrier)">Boom</a></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Bret%C3%A8che" title="Bretèche">Bretèche</a></i></span></li> <li><a href="/wiki/Bridge_castle" title="Bridge castle">Bridge castle</a></li> <li><a href="/wiki/Bridge_tower" title="Bridge tower">Bridge tower</a></li> <li><a href="/wiki/Burh" title="Burh">Burh</a></li> <li><a href="/wiki/Butter-churn_tower" title="Butter-churn tower">Butter-churn tower</a></li> <li><a href="/wiki/Caer" title="Caer">Caer</a></li> <li><a href="/wiki/Castle" title="Castle">Castle</a></li> <li><a href="/wiki/Chamber_gate" title="Chamber gate">Chamber gate</a></li> <li><a href="/wiki/Chartaque" title="Chartaque">Chartaque</a></li> <li><span title="Japanese-language text"><i lang="ja-Latn"><a href="/wiki/Chashi" title="Chashi">Chashi</a></i></span></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Chemin_de_ronde" title="Chemin de ronde">Chemin de ronde</a></i></span></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Chemise_(wall)" title="Chemise (wall)">Chemise</a></i></span></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Cheval_de_frise" title="Cheval de frise">Cheval de frise</a></i></span></li> <li><a href="/wiki/Citadel" title="Citadel">Citadel</a></li> <li><a href="/wiki/Coercion_castle" title="Coercion castle">Coercion castle</a></li> <li><a href="/wiki/Concentric_castle" title="Concentric castle">Concentric castle</a></li> <li><a href="/wiki/Corner_tower" title="Corner tower">Corner tower</a></li> <li><a href="/wiki/Counter-castle" title="Counter-castle">Counter-castle</a></li> <li><a href="/wiki/Curtain_wall_(fortification)" title="Curtain wall (fortification)">Curtain</a></li> <li><a href="/wiki/Drawbridge" title="Drawbridge">Drawbridge</a></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Enceinte" title="Enceinte">Enceinte</a></i></span></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Embrasure" title="Embrasure">Embrasure</a></i></span></li> <li><a href="/wiki/Flanking_tower" title="Flanking tower">Flanking tower</a></li> <li>Fortified buildings (<a href="/wiki/Fortified_church" title="Fortified church">church</a>, <a href="/wiki/Fortified_house" title="Fortified house">house</a>, <a href="/wiki/Dzong_architecture" title="Dzong architecture">Dzong</a>)</li> <li><a href="/wiki/Fujian_tulou" title="Fujian tulou">Fujian tulou</a></li> <li><i><a href="/wiki/Ganerbenburg" title="Ganerbenburg">Ganerbenburg</a></i></li> <li><a href="/wiki/Gate_tower" title="Gate tower">Gate tower</a></li> <li><a href="/wiki/Gabion" title="Gabion">Gabion</a></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Glacis" title="Glacis">Glacis</a></i></span></li> <li><a href="/wiki/Guard_tower" class="mw-redirect" title="Guard tower">Guard tower</a></li> <li><span title="Russian-language text"><i lang="ru-Latn"><a href="/wiki/Gulyay-gorod" title="Gulyay-gorod">Gulyay-gorod</a></i></span></li> <li><span title="Japanese-language text"><i lang="ja-Latn"><a href="/wiki/Gusuku" title="Gusuku">Gusuku</a></i></span></li> <li><a href="/wiki/Half_tower" title="Half tower">Half tower</a></li> <li><a href="/wiki/Hoarding_(castle)" title="Hoarding (castle)">Hoarding</a></li> <li><a href="/wiki/Inner_bailey" title="Inner bailey">Inner bailey</a></li> <li><a href="/wiki/Kasbah" title="Kasbah">Kasbah</a></li> <li><a href="/wiki/Keep" title="Keep">Keep</a></li> <li><span title="Russian-language text"><i lang="ru-Latn"><a href="/wiki/Kremlin_(fortification)" title="Kremlin (fortification)">Kremlin</a></i></span> <small>(<span title="Russian-language text"><i lang="ru-Latn"><a href="/wiki/Detinets" title="Detinets">Detinets</a></i></span>)</small></li> <li><a href="/wiki/Ksar" title="Ksar">Ksar</a></li> <li><span title="German-language text"><i lang="de"><a href="/wiki/Landesburg" title="Landesburg">Landesburg</a></i></span></li> <li><a href="/wiki/Loophole" title="Loophole">Loophole</a></li> <li><a href="/wiki/L-plan_castle" title="L-plan castle">L-plan castle</a></li> <li><a href="/wiki/Machicolation" title="Machicolation">Machicolation</a></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Merlon" title="Merlon">Merlon</a></i></span></li> <li><a href="/wiki/Moat" title="Moat">Moat</a></li> <li><a href="/wiki/Motte-and-bailey_castle" title="Motte-and-bailey castle">Motte-and-bailey</a></li> <li><a href="/wiki/Murder_hole" title="Murder hole">Murder hole</a></li> <li><a href="/wiki/Neck_ditch" title="Neck ditch">Neck ditch</a></li> <li><a href="/wiki/Outer_bailey" title="Outer bailey">Outer bailey</a></li> <li><a href="/wiki/Outwork" title="Outwork">Outwork</a></li> <li><a href="/wiki/Parapet" title="Parapet">Parapet</a></li> <li><a href="/wiki/Peel_tower" title="Peel tower">Peel tower</a></li> <li><a href="/wiki/Portcullis" title="Portcullis">Portcullis</a></li> <li><a href="/wiki/Postern" title="Postern">Postern</a></li> <li><a href="/wiki/Powder_tower" title="Powder tower">Powder tower</a></li> <li><a href="/wiki/Qalat_(fortress)" title="Qalat (fortress)">Qalat</a></li> <li><a href="/wiki/Reduit" title="Reduit">Reduit</a></li> <li><a href="/wiki/Ribat" title="Ribat">Ribat</a></li> <li><a href="/wiki/Ricetto" title="Ricetto">Ricetto</a></li> <li><a href="/wiki/Ringwork" title="Ringwork">Ringwork</a></li> <li><a href="/wiki/Roundel_(fortification)" title="Roundel (fortification)">Roundel</a></li> <li><a href="/wiki/Quadrangular_castle" title="Quadrangular castle">Quadrangular castle</a></li> <li><a class="mw-selflink selflink">Shell keep</a></li> <li><a href="/wiki/Shield_wall_(castle)" title="Shield wall (castle)">Shield wall</a></li> <li><span title="Japanese-language text"><i lang="ja-Latn"><a href="/wiki/Japanese_castle" title="Japanese castle">Shiro</a></i></span></li> <li><a href="/wiki/Toll_castle" title="Toll castle">Toll castle</a></li> <li><a href="/wiki/Tower_castle" title="Tower castle">Tower castle</a></li> <li><a href="/wiki/Tower_house" title="Tower house">Tower house</a></li> <li><a href="/wiki/Turret_(architecture)" title="Turret (architecture)">Turret</a></li> <li><a href="/wiki/Viking_ring_fortress" title="Viking ring fortress">Viking ring fortress</a></li> <li><a href="/wiki/Fortified_tower" title="Fortified tower">Wall tower</a></li> <li><a href="/wiki/Bailey_(castle)" title="Bailey (castle)">Bailey (or ward)</a></li> <li><a href="/wiki/Watchtower" title="Watchtower">Watchtower</a></li> <li><a href="/wiki/Witch_tower" title="Witch tower">Witch tower</a></li> <li><span title="Japanese-language text"><i lang="ja-Latn"><a href="/wiki/Yagura_(tower)" title="Yagura (tower)">Yagura</a></i></span></li> <li><a href="/wiki/Yett" title="Yett">Yett</a></li> <li><a href="/wiki/Zwinger" title="Zwinger">Zwinger</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Modern</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:3em">Early modern</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><span title="German-language text"><i lang="de"><a href="/wiki/Abwurfdach" class="mw-redirect" title="Abwurfdach">Abwurfdach</a></i></span></li> <li><a href="/wiki/Arsenal" title="Arsenal">Arsenal</a></li> <li><a href="/wiki/Barricade" title="Barricade">Barricade</a></li> <li><a href="/wiki/Bastion" title="Bastion">Bastion</a></li> <li><a href="/wiki/Blockhouse" title="Blockhouse">Blockhouse</a></li> <li><a href="/wiki/Breastwork_(fortification)" title="Breastwork (fortification)">Breastwork</a></li> <li><a href="/wiki/Canal" title="Canal">Canal</a></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Caponier" title="Caponier">Caponier</a></i></span></li> <li><a href="/wiki/Casemate" title="Casemate">Casemate</a></li> <li><a href="/wiki/Cavalier_(fortification)" title="Cavalier (fortification)">Cavalier</a></li> <li><a href="/wiki/Counterguard" title="Counterguard">Counterguard</a></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Couvreface" title="Couvreface">Couvreface</a></i></span></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Coupure" title="Coupure">Coupure</a></i></span></li> <li><a href="/wiki/Covertway" title="Covertway">Covertway</a></li> <li><a href="/wiki/Crownwork" title="Crownwork">Crownwork</a></li> <li><a href="/wiki/Device_Forts" title="Device Forts">Device Forts</a></li> <li><a href="/wiki/Entrenchment_(fortification)" title="Entrenchment (fortification)">Entrenchment</a></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Fl%C3%A8che_(fortification)" title="Flèche (fortification)">Flèche</a></i></span></li> <li><a href="/wiki/Gorge_(fortification)" title="Gorge (fortification)">Gorge</a></li> <li><a href="/wiki/Gunpowder_magazine" title="Gunpowder magazine">Gunpowder magazine</a></li> <li><a href="/wiki/Hornwork" title="Hornwork">Hornwork</a></li> <li><a href="/wiki/Kotta_mara" title="Kotta mara">Kotta mara</a></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Lunette_(fortification)" title="Lunette (fortification)">Lunette</a></i></span></li> <li><a href="/wiki/Magazine_(artillery)" title="Magazine (artillery)">Magazine</a></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Orillon" title="Orillon">Orillon</a></i></span></li> <li><span title="Russian-language text"><i lang="ru-Latn"><a href="/wiki/Ostrog_(fortress)" title="Ostrog (fortress)">Ostrog</a></i></span></li> <li><a href="/wiki/Palanka_(fortification)" title="Palanka (fortification)">Palanka</a></li> <li><a href="/wiki/Place-of-arms" title="Place-of-arms">Place-of-arms</a></li> <li><a href="/wiki/Polygonal_fort" title="Polygonal fort">Polygonal fort</a></li> <li><span title="Spanish-language text"><i lang="es"><a href="/wiki/Presidio" title="Presidio">Presidio</a></i></span> (Spanish America)</li> <li><a href="/wiki/Punji_stick" title="Punji stick">Punji sticks</a></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Ravelin" title="Ravelin">Ravelin</a></i></span></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Redan" title="Redan">Redan</a></i></span></li> <li><a href="/wiki/Redoubt" title="Redoubt">Redoubt</a></li> <li><a href="/wiki/Retrenchment_(military)" title="Retrenchment (military)">Retrenchment</a></li> <li><a href="/wiki/Sally_port" title="Sally port">Sally port</a></li> <li><a href="/wiki/Sandbag" title="Sandbag">Sandbag</a></li> <li><a href="/wiki/Counterscarp" title="Counterscarp">Scarp and Counterscarp</a></li> <li><a href="/wiki/Sconce_(fortification)" title="Sconce (fortification)">Sconce</a></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Schanze" title="Schanze">Schanze</a></i></span></li> <li><a href="/wiki/Sea_fort" class="mw-redirect" title="Sea fort">Sea fort</a></li> <li><a href="/wiki/Station_(frontier_defensive_structure)" title="Station (frontier defensive structure)">Station</a></li> <li><a href="/wiki/Star_fort" class="mw-redirect" title="Star fort">Star fort</a></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Tenaille" title="Tenaille">Tenaille</a></i></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:3em">19th century</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Barbed_wire" title="Barbed wire">Barbed wire</a></li> <li><span title="French-language text"><i lang="fr"><a href="/wiki/Barbette" title="Barbette">Barbette</a></i></span></li> <li><a href="/wiki/Border_outpost" title="Border outpost">Border outpost</a></li> <li><a href="/wiki/Bunker" title="Bunker">Bunker</a></li> <li><a href="/wiki/Coastal_artillery" title="Coastal artillery">Coastal artillery</a></li> <li><a href="/wiki/Disappearing_gun" title="Disappearing gun">Disappearing gun</a></li> <li><a href="/wiki/Fire_control_tower" title="Fire control tower">Fire control tower</a></li> <li><a href="/wiki/Gun_turret" title="Gun turret">Gun turret</a></li> <li><a href="/wiki/Land_mine" title="Land mine">Land mine</a></li> <li><a href="/wiki/Martello_tower" title="Martello tower">Martello tower</a></li> <li><a href="/wiki/Outpost_(military)" title="Outpost (military)">Outpost</a></li> <li><a href="/wiki/Polygonal_fort" title="Polygonal fort">Polygonal fort</a></li> <li><span title="Persian-language text"><i lang="fa-Latn"><a href="/wiki/Sangar_(fortification)" title="Sangar (fortification)">Sangar</a></i></span></li> <li><a href="/wiki/Wire_obstacle" title="Wire obstacle">Wire obstacles</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:3em">20th century</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Admiralty_scaffolding" title="Admiralty scaffolding">Admiralty scaffolding</a></li> <li><a href="/wiki/Air_raid_shelter" title="Air raid shelter">Air raid shelter</a></li> <li><a href="/wiki/Anti-tank_trench" title="Anti-tank trench">Anti-tank trench</a></li> <li><a href="/wiki/Barbed_tape" class="mw-redirect" title="Barbed tape">Barbed tape</a></li> <li><a href="/wiki/Cointet-element" title="Cointet-element">Belgian gate</a></li> <li><a href="/wiki/Blast_shelter" title="Blast shelter">Blast shelter</a></li> <li><a href="/wiki/Blast_wall" title="Blast wall">Blast wall</a></li> <li><a href="/wiki/Border_security" class="mw-redirect" title="Border security">Border security</a></li> <li><a href="/wiki/Bomb_shelter" title="Bomb shelter">Bomb shelter</a></li> <li><a href="/wiki/Buoy_anti-tank_obstacle" title="Buoy anti-tank obstacle">Buoy</a></li> <li><a href="/wiki/Bremer_wall" title="Bremer wall">Bremer wall</a></li> <li><a href="/wiki/Concertina_wire" title="Concertina wire">Concertina wire</a></li> <li><a href="/wiki/Defensive_fighting_position" title="Defensive fighting position">Defensive fighting position</a></li> <li><a href="/wiki/British_anti-invasion_preparations_of_the_Second_World_War#Lines_and_islands" title="British anti-invasion preparations of the Second World War">British "hedgehog" road block</a></li> <li><a href="/wiki/Czech_hedgehog" title="Czech hedgehog">Czech hedgehog</a></li> <li><a href="/wiki/Dragon%27s_teeth_(fortification)" title="Dragon's teeth (fortification)">Dragon's teeth</a></li> <li><a href="/wiki/Forward_operating_base" title="Forward operating base">Entry control point (ECP)</a></li> <li><a href="/wiki/Electric_fence" title="Electric fence">Electric fence</a></li> <li><a href="/wiki/Fallout_shelter" title="Fallout shelter">Fallout shelter</a></li> <li><a href="/wiki/Fire_support_base" title="Fire support base">Fire support base</a></li> <li><a href="/wiki/Flak_tower" title="Flak tower">Flak tower</a></li> <li><a href="/wiki/Hardened_aircraft_shelter" title="Hardened aircraft shelter">Hardened aircraft shelter</a></li> <li><a href="/wiki/Hesco_bastion" title="Hesco bastion">Hesco bastion</a></li> <li><a href="/wiki/Kabal_(earthworks)" title="Kabal (earthworks)">Kabal</a></li> <li><a href="/wiki/Loophole_(firearm)" title="Loophole (firearm)">Loophole</a></li> <li><a href="/wiki/Main_line_of_resistance" title="Main line of resistance">Main line of resistance</a></li> <li><a href="/wiki/Missile_launch_facility" title="Missile launch facility">Missile launch facility</a></li> <li><a href="/wiki/Pillbox_(military)" title="Pillbox (military)">Pillbox</a></li> <li><a href="/wiki/Revetment_(aircraft)" title="Revetment (aircraft)">Revetment</a></li> <li><a href="/wiki/Sentry_gun" title="Sentry gun">Sentry gun</a></li> <li><a href="/wiki/Spider_hole" title="Spider hole">Spider hole</a></li> <li><a href="/wiki/Submarine_pen" title="Submarine pen">Submarine pen</a></li> <li><a href="/wiki/Underground_hangar" title="Underground hangar">Underground hangar</a></li> <li><a href="/wiki/Weapon_storage_area" title="Weapon storage area">Weapon storage area</a></li> <li><a href="/wiki/Weapons_Storage_and_Security_System" title="Weapons Storage and Security System">Weapons Storage and Security System</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">By topography</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cave_castle" title="Cave castle">Cave castle</a></li> <li><a href="/wiki/Hill_castle" title="Hill castle">Hill castle</a></li> <li><a href="/wiki/Hillfort" title="Hillfort">Hillfort</a></li> <li><a href="/wiki/Hillside_castle" title="Hillside castle">Hillside castle</a></li> <li><a href="/wiki/Hilltop_castle" title="Hilltop castle">Hilltop castle</a></li> <li><a href="/wiki/Island_castle" title="Island castle">Island castle</a></li> <li><a href="/wiki/Lowland_castle" title="Lowland castle">Lowland castle</a></li> <li><a href="/wiki/Marsh_castle" title="Marsh castle">Marsh castle</a></li> <li><a href="/wiki/Water_castle" title="Water castle">Moated castle</a></li> <li><a href="/wiki/Promontory_fort" title="Promontory fort">Promontory fort</a></li> <li><a href="/wiki/Ridge_castle" title="Ridge castle">Ridge castle</a></li> <li><span title="Italian-language text"><i lang="it"><a href="/wiki/Rocca_(fortification)" title="Rocca (fortification)">Rocca</a></i></span></li> <li><a href="/wiki/Rock_castle" title="Rock castle">Rock castle</a></li> <li><a href="/wiki/Spur_castle" title="Spur castle">Spur castle</a></li> <li><a href="/wiki/Water_castle" title="Water castle">Water castle</a></li> <li><a href="/wiki/Kotta_mara" title="Kotta mara">Floating water castle</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">By role</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Border_barrier" title="Border barrier">Border barrier</a></li> <li><a href="/wiki/Coastal_defence_and_fortification" title="Coastal defence and fortification">Coastal defence</a></li> <li><a href="/wiki/Coercion_castle" title="Coercion castle">Coercion castle</a></li> <li><a href="/wiki/Counter-castle" title="Counter-castle">Counter-castle</a></li> <li><a href="/wiki/Fence" title="Fence">Fence</a></li> <li><i><a href="/wiki/Ganerbenburg" title="Ganerbenburg">Ganerbenburg</a></i></li> <li><a href="/wiki/Jagdschloss" title="Jagdschloss">Hunting lodge</a></li> <li><a href="/wiki/Imperial_castle" title="Imperial castle">Imperial castle</a></li> <li><span title="German-language text"><i lang="de"><a href="/wiki/Kaiserpfalz" title="Kaiserpfalz">Kaiserpfalz</a></i></span></li> <li><span title="German-language text"><i lang="de"><a href="/wiki/Landesburg" title="Landesburg">Landesburg</a></i></span></li> <li><span title="German-language text"><i lang="de"><a href="/wiki/Lustschloss" title="Lustschloss">Lustschloss</a></i></span></li> <li><a href="/wiki/Military_base" title="Military base">Military base</a></li> <li><a href="/wiki/Obstacle" title="Obstacle">Obstacle</a></li> <li><span title="German-language text"><i lang="de"><a href="/wiki/Ordensburg" title="Ordensburg">Ordensburg</a></i></span></li> <li><a href="/wiki/Refuge_castle" title="Refuge castle">Refuge castle</a></li> <li><a href="/wiki/Toll_castle" title="Toll castle">Toll castle</a></li> <li><a href="/wiki/Urban_castle" title="Urban castle">Urban castle</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">By design</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bastion_fort" title="Bastion fort">Bastion fort</a></li> <li><a href="/wiki/Bridge_castle" title="Bridge castle">Bridge castle</a></li> <li><a href="/wiki/Circular_rampart" title="Circular rampart">Circular rampart</a></li> <li><a href="/wiki/Concentric_castle" title="Concentric castle">Concentric castle</a></li> <li><a href="/wiki/L-plan_castle" title="L-plan castle">L-plan castle</a></li> <li><a href="/wiki/Motte-and-bailey_castle" title="Motte-and-bailey castle">Motte-and-bailey castle</a></li> <li><a href="/wiki/Quadrangular_castle" title="Quadrangular castle">Quadrangular castle</a></li> <li><a href="/wiki/Ringfort" title="Ringfort">Ringfort</a></li> <li><a href="/wiki/Ringwork" title="Ringwork">Ringwork</a></li> <li><a href="/wiki/Tower_castle" title="Tower castle">Tower castle</a></li> <li><a href="/wiki/Z-plan_castle" title="Z-plan castle">Z-plan castle</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Lists</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_bastion_forts" title="List of bastion forts">Bastion forts</a></li> <li><a href="/wiki/List_of_castles" title="List of castles">Castles</a></li> <li><a href="/wiki/List_of_cities_with_defensive_walls" title="List of cities with defensive walls">Cities with defensive walls</a></li> <li><a href="/wiki/Defense_line" title="Defense line">Defense line</a></li> <li><a href="/wiki/Fortified_estate" class="mw-redirect" title="Fortified estate">Fortified estate</a></li> <li><a href="/wiki/List_of_fortifications" title="List of fortifications">Fortifications</a></li> <li><a href="/wiki/List_of_forts" title="List of forts">Forts</a></li> <li><a href="/wiki/Lists_of_military_installations" title="Lists of military installations">Military installations</a></li> <li><a href="/wiki/List_of_walls" title="List of walls">Walls</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related word</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Castle_town" title="Castle town">Castle town</a></li> <li><a href="/wiki/Ch%C3%A2teau" title="Château">Château</a></li> <li><a href="/wiki/Dungeon" title="Dungeon">Dungeon</a></li> <li><a href="/wiki/Festung" title="Festung">Festung</a></li> <li><a href="/wiki/Fortified_gateway" title="Fortified gateway">Fortified gateway</a></li> <li><a href="/wiki/Gatekeeper" title="Gatekeeper">Gatekeeper</a></li> <li><a href="/wiki/Loophole_(firearm)" title="Loophole (firearm)">Loophole</a></li> <li><a href="/wiki/National_redoubt" title="National redoubt">National redoubt</a></li> <li><a href="/wiki/Palas" title="Palas">Palas</a></li> <li><a href="/wiki/Picket_(military)" title="Picket (military)">Picket</a></li> <li><a href="/wiki/Schloss" title="Schloss">Schloss</a></li> <li><a href="/wiki/Trench" title="Trench">Trench</a></li> <li><a href="/wiki/Vedette_(sentry)" title="Vedette (sentry)">Vedette</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other topics</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Civil_defense" title="Civil defense">Civil defense</a></li> <li><a href="/wiki/Continuity_of_government" title="Continuity of government">Continuity of government</a></li> <li><a href="/wiki/Military_urbanism" title="Military urbanism">Military urbanism</a></li> <li><a href="/wiki/Subterranean_warfare" title="Subterranean warfare">Subterranean warfare</a></li> <li><a href="/wiki/Siege" title="Siege">Siege</a></li> <li><a href="/wiki/Siege_engine" title="Siege engine">Siege engine</a> <ul><li><a href="/wiki/List_of_siege_engines" title="List of siege engines">list</a></li></ul></li> <li><a href="/wiki/Tunnel_warfare" title="Tunnel warfare">Tunnel warfare</a></li> <li><a href="/wiki/Trench_warfare" title="Trench warfare">Trench warfare</a></li> <li><a href="/wiki/Urban_warfare" title="Urban warfare">Urban warfare</a> <ul><li><a href="/wiki/Urban_guerrilla_warfare" class="mw-redirect" title="Urban guerrilla warfare">Guerrilla</a></li></ul></li></ul> </div></td></tr><tr><td class="navbox-abovebelow hlist" colspan="2"><div> <ul><li><span class="nobold">See also</span>: <b><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" 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