panorama of roman amphitheatre at archaeological park in xanten, unesco world heritage site, north rhine-westphalia, germany

archaeologischer rhinewestphalia archaeological amphitheatre amphitheater architecture constructed foundations archaeology destination niederrhein settlement westphalia flagstones inferioris fortified frontiers germaniae limestone rhineland panorama heritage original circular germanic historic imposing pavement germany partial replica colonia traiana western arcades borders columns emperor harbour history pattern regular tourism tourist trajana xanten unesco towers german empire arches europe trajan travel roman