piazza san marco st mark square in venice, patriarchal cathedral basilica of saint mark archdiocese

archdiocese architecture background basilica bell blue brick building campanile cathedral catholic centre church city cityscape europe european exterior famous historic italian italobyzantine italy landmark marco mark museum northern old patriarchal patriarchate piazza procuratie region roman saint san sightseeing sky square style symbol tourism tower town traditional travel vecchie venetian veneto venezia venice