Battlement
"Castellated" redirects here. For the hardware item, see castellated nut. "Embattled" redirects here. For heraldic term, see embattled (heraldry). Battlements on the Great Wall of China Drawing of battlements on a tower Decorative battlements in Persepolis Battlements of a tower of Bam Citadel, Iran A battlement in defensive architecture, such as that of city walls or castles, comprises a parapet (i.e., a defensive low wall between chest-height and head-height), in which gaps or indentations, which are often rectangular, occur at intervals to allow for the launch of arrows or other projectiles from within the defences. These gaps are termed "crenels" (also known as carnels , or embrasures ), and the act of adding crenels to a previously unbroken parapet is termed crenellation . Thus, a defensive building might be designed and built with battlements, or a manor house might be fortified by adding battlements, where no parapet previou...