Glacis
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A glacis in military engineering is an artificial slope as part of a medieval castle or in early modern fortresses. They may be constructed of earth as a temporary structure or of stone in more perman
Middle Bronze Age glacis in 'En Esur, Israel
Krak des Chevaliers, a medieval Crusader castle in Syria. The south face of the inner ward with its steep glacis.
Iron Age ramparts and ditches in Maiden Castle.
Glacis, Mont-Louis Fortress, Pyrénées-Orientales, France
Batter (walls)
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In architecture, batter is the receding slope of a wall, structure, or earthwork, the opposite of an overhang. When used in fortifications it may be called a talus.
Tomb of Ghiyath al-Din Tughluq (d. 1325), Delhi, with a batter of 25°.
A batter frame is used to guide the construction of a battered dry stone wall.
Ancient Egyptian pylons were often battered.
The Krak des Chevaliers in Syria, with a tall and clearly defined talus