31350799fortificationsPT2026-03-30 20:34:39UF31350800fortificationNDBT31323621single built works by functionPTNT31350711acropolisesPTNT31348512fortification elementsPTNT31381068city wallsPTNT31381072bawnsPTNT31381074castlesPTNT31381076fortressesPTNT31381079fortsPTNT31381081redoubtsPTNT31381083stockadesPTNT31381085field fortificationsPTNT31381090limitesPTNT31381093plant fortificationsPTNT31381098coastal fortificationsPTNT31381107barricadesPTNT31381109antiaircraft towersPTNT31381112tighremtsPTNT31351230burgsPTNT31381114sconcesPTNT31381116linesPTNT31381118pillboxesPTNT31381120guard boothsPT