Editing Concentric castle (section)

{{Short description|Type of fortification}}
[[File:敘利亞騎士堡 8721.jpg|thumb|300px|[[Krak des Chevaliers]] (Syria), the best preserved of the concentric crusader castles]]
[[File:Belvoir plan 0.PNG|thumb|Plan of [[Belvoir Fortress (Israel)|Belvoir Castle]] (Israel)]]
A '''concentric castle''' is a [[castle]] with two or more        concentric [[Curtain wall (fortification)|curtain walls]], such that the outer wall is lower than the inner and can be defended from it.<ref name=kennedy2000>{{cite book | author=Kennedy, Hugh |title=Crusader Castles | publisher=Cambridge University Press | year=2000 | isbn=0-521-79913-9}}</ref> The layout was square (at [[Belvoir Fortress|Belvoir]] and [[Beaumaris Castle|Beaumaris]]) where the terrain permitted, or an irregular polygon (at [[Krak des Chevaliers|Krak]] and [[Margat]]) where curtain walls of a [[spur castle]] followed the contours of a hill.

Concentric castles resemble one castle nested inside the other, thus creating an [[ward (fortification)|inner and outer ward]]. They are typically built without a central free-standing [[keep]]. Where the castle includes a particularly strong tower ([[donjon]]), such as at Krak or Margat, it projects from the inner [[enceinte]].