reconstructed roman gateway with watchtowers

ancient arched architectural architecture attraction backdrop background bavaria biriciana building castell castra castru castrum construction decumana defence defensive empire entrance entry exit fort fortification fortified fortress garrison gate gateway germany grounds historical history isolated limes military monument north porta reconstructed reconstruction roman romans scenery setting stone stronghold tourism touristic uppergermanic view wallpaper watchtower watchtowers weissenburg weienburg structure structural passage brick masonry arch arches stonework brickwork bricks wall towers