the vaulted ceiling and organ pipes of saint kastor's basilica in koblenz germany

ancient architecture attraction basilica basilika kastor building castor cathedral catholic christianity church coblenz culture decorated devotion europe famous germany glass gleaming heritage historic indoors inside interior kastorkirche koblenz landmark mediaeval medieval old organ pipes religion rhineland stained tourism town travel unesco vaulted worship kastor's main framed sculptures decorative window saint imposing reflection prayer