bartizan

thumb|Drawing of a bartizan

A bartizan (an alteration of bratticing), also called a guerite, garita, or échauguette, or spelled bartisan, is an overhanging turret projecting from the walls of late-medieval and early-modern fortifications from the early 14th century up to the 18th century. Most frequently found at corners, they protected a warder and enabled him to see his surroundings. Bartizans are generally furnished with oillets or arrow slits. The turret was usually supported by stepped masonry corbels and could be round, polygonal or square.