For the 2011 song by T.I. featuring Christina Aguilera, see Castle Walls
A curtain wall is the defensive wall surrounding the bailey of a medieval castle.1 It can also be a defensive wall between two bastions of a castle or fortress2 in post-medieval fortifications.
In earlier designs of castles the curtain walls were often built to a considerable height and were fronted by a ditch or moat to make assault difficult.
Later with the introduction of trace italienne fortifications the height of the curtain walls was reduced and beyond the ditch additional outworks such as ravelins and tenailles were added to protect the curtain walls from direct cannonading.
- Whitelaw, A., ed. (1846), The Popular Encyclopedia; or, Conversations Lexicon I, Glasgow, Edinburgh, and London: Blackie & Son
- Friar, Stephen (2003). The Sutton Companion to Castles, Sutton Publishing, Stroud, 2003. ISBN 978-0-7509-3994-2