Terreplein



Terreplein, or terre-plein — in fortifications is the top, platform, or horizontal surface, of a rampart, on which cannon are placed. In Martello towers, the roof or terreplein was sometimes surmounted with one or two cannon on a gun platform with a central pivot that enabled the guns to rotate up to 360 degrees.

In civil engineering works, a terreplein is an embankment of earth with a broad level top, which is sometimes excavated to form a continuation of an elevated canal across a valley.