In military fortification, a contramure, or countermure, is a wall raised behind another to supply its place when breached or destroyed.[1]
The term was also used to refer to an outer wall built around the wall of a city.[2]
This article incorporates text from this source, which is in the public domain. Porter, Noah, ed. (1913). Webster's Dictionary. Springfield, Massachusetts: C. & G. Merriam Co. 
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This article incorporates text from a publication now in the public domain: Chambers, Ephraim, ed. (1728). Cyclopædia, or an Universal Dictionary of Arts and Sciences (1st ed.). James and John Knapton, et al. {{cite encyclopedia}}: Missing or empty |title= (help)
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