cologne cathedral with a residential apartment building in front with blue sky. cologne cathedral, or kolner dom, is the main

cologne cathedral koln koeln kolner dom koelner german germany deutsch deutschland nrw religion gothic history catholicism christianity church travel religious christian catholic landmark tourism steeple architecture europe north rhinewestphalia city center altstadt old town immobilien building real estate business property facade urban historical outdoors rhine westphalia architectural cityscape residential apartment front blue sky main afternoon rhine-westphalia seat archbishop administration archdiocese cologne renowned monument declared world heritage site 1996