Coping (architecture)
(重定向自Coping stone)

Coping (from cope, Latin capa), consists of the capping or covering of a wall.
A splayed or wedge coping slopes in a single direction; a saddle coping slopes to either side of a central high point.
A coping may consist of stone (capstone), brick, tile, slate, metal, wood or thatch. In all cases it should be weathered to throw off the water.