aachen cathedral albert i of germany balcony bamberg basilica bauhaus bavaria bertha of savoy bremen roland cologne cathedral colonnade dresden elbe valley eisleben fresco geographic coordinate system germany gisela of swabia goslar history of roman catholic mariology limes germanicus list of unesco world heritage sites in the united kingdom list of world heritage sites in europe list of world heritage sites in poland louis xiv of france ludwig i of bavaria marian doctrines of the catholic church mariology of the popes mariology of the saints maulbronn abbey mines of rammelsberg nave palaces and parks of potsdam and berlin public domain quedlinburg quedlinburg abbey regensburg reichenau island rhine gorge roman catholic marian art roman catholic marian music roman catholic mariology romanesque architecture rudolph i of germany sandstone speyer stralsund transept unesco weimar wies church wikimedia commons wismar wittenberg world heritage site zollverein coal mine industrial complex