germany, aachen, aachen cathedral travel landmark

vector illustration landmark aachen cathedral germany charlemagne gothic architecture historical sites cultural heritage holy roman empire unesco world site th century pilgrimage relics empress theophanu emperor otto iii coronation mosaic art marble statues st marys chapel palatine thcentury murals royal crypt pilgrimages medieval times carolingian charles v religious ceremonies german culture helens treasury ornate interiors main gate ferdinand tietz romanesque lorraine cross imperial thr masses unique staircase virtuosic choir ravenna mosaics golden windows frederick ii sarcophagus of