germany, cologne, st. gereon's basilica i travel landmark

vector illustration landmark history of st gereons basilica gothic architecture in cologne relics gereon colognes ancient churches cultural heritage germany oldest religious romanesque art the walls crypt touring significance cathedral vs festival celebrations how influenced patron saint intricate frescoes best time to visit unique features restoration beauty origins as a pilgrimage site mosaic treasure apsidal area nave famous visitors bell tower alabaster window baptismal font organ stained glass chapel apse maurice soldiers and legend ambulatory towers sacristy vaults portal