the basilica of san petronio framed by an arch of the ancient palazzo comunale or d'accursio, bologna italy

accursi ancient arch architecture basilica blue bologna brick building cathedral center central church city cityscape clock column columns comunale 39aph39 accursio duomo emilia europe facade hall historic historical italian italy maggiore main medieval outdoor palace palazzo piazza quiet romagna san petronio sightseeing sky square stone summer sunny tourism tourist tower town travel