雉堞,又稱齒牆、垛牆、戰牆,是有鋸齒狀垛牆的城牆。可用來作為守禦城牆者在反擊攻城者時的掩蔽之用。垛口長度約幾十CM到2M。 古代計算城牆面積的單位是「方丈曰堵,三堵曰雉,一雉之牆,長三丈,高一丈」。堞則是城牆上如齒狀的薄型矮牆。

垛口看出去的情景

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