A projecting gallery at the top of a castle wall, supported by a row of corbeled arches and having openings in the floor through which stones and boiling liquids could be dropped on attackers.

• 有堞式射击口的胸墙在堡城上部突出的长廊，由一排靠梁托支持的弓形结构支撑，通过长廊在地面的开口可向进攻者投掷石块和倾倒沸水