panorama of saint-petersburg from saint isaacs cathedral collonade

angel architecture autumn background beautiful blue building cathedral christianity church city cityscape collonade colonnade color cupola dome eastern europe fall famous golden heritage historic history isaac isaacs isaak isaakievski isaakievsky isaaks landmark landmarks old onion orthodox panorama panoramic peterburg petersburg photo popular religion russia russian saint saintpetersburg scape scenic season site sky springtime temple tourism tourists travel tree unesco urban view viewpoint world yellow