In the medieval fortification, the turret, built on the crown of the defensive wall, usually overhanged, accessible from the sidewalk, contained guard posts and arrowslits. The stonework is usually straight: round, quadrilateral or polygonal, open from the inside, mostly covered. Defense equipment was a arrowslits, possibly machicolation. Bartizans was most often built on long sections of walls in the absence of towers, sometimes at the point of bend of the defensive line.
