bastion orillon chauguette, bartizan at jaca citadel ramparts, ditch, counterscarp, covered way

architectonic fortification architecture counterguard counterscarp edification sightseeing chauguette ciudadela undefined bartisan bartizan building entrance exterior flanking hornwork military pyrenees tenaille cannons citadel covered daytime edifice guerite lunette rampart ravelin redoubt aragon bridge castle facade famous glacis huesca shaped ditch spain shape stone blue city draw fort jaca moat star art sky