curtain wall
Noun
Meaning
(military, historical) The outer wall of a castle or defensive wall between two bastions.
(architecture) The non-load-bearing outer skin of a modern building.
Source: en.wiktionary.orgSynonyms
Examples
Admittedly the southwestern parts of the building of the baroque Dresden Zwinger including the Kronentor gate stand on parts of the outer curtain wall that are still visible today; but there is no longer any trace of the inner wall.
An earthen bank could be piled behind a castle's curtain wall to absorb some of the shock of impact.
Its outer defenses consist of a huge curtain wall, convert tall and convert thick on its thinnest side, nearly convert thick on its seaward side.
It made approaching the curtain wall of the castle more difficult and the undermining of the wall virtually impossible.
Its purpose was twofold; to stop devices such as siege towers from reaching the curtain wall and to prevent the walls from being undermined.
King Christian III had the corners of the curtain wall supplemented with bastions in 1558-59.