Wall.

Wall. See the relevant section under BUILDING, and other articles there referred to; BUTTRESS; the articles on the various styles of architecture; and for military building, FORTIFICATION. For ancient lines of defence, see ANTONINUS (WALL OF), HADRIAN'S WALL, CATRAIL, and OFFA'S DYKE. Of old walled towns, retaining more or less completely their ancient walls of fortification, may be named in the British Isles Berwick, Alnwick, York, Chester, Conway, Tenby, Dover, Wareham, Limerick, and Derry.