roman harbour temple in archaeological park, unesco world heritage site, xanten, lower rhine, north rhine-westphalia, germany

nordrheinwestfalen archaeologischer rhinewestphalia archaeological constructed foundations archaeology niederrhein settlement westphalia inferioris fortified frontiers germaniae limestone nordrhein rhineland westfalen heritage original frontier germanic historic imposing lorraine harbour germany partial replica colonia traiana western borders columns emperor history soaring trajana temple unesco xanten german empire border europe harbor trajan roman world lower rhine north ulpia limes Upper Raetian limes river blue sky white concrete harbor archaeological site excavations reconstruction