The Piazza, pakushayikwa mamwe nzvimbo paruzhinji uye nzvimbo simba revanhu, raiva guta chete paruzhinji nzvimbo yose Middle Ages. The Cathedral akatsaurirwa naPapa Gelasius II muna 1118, uye kubva 1133 akanga archiepiscopal chinzvimbo. Pashure moto 1296, zvinokonzerwa nokurwisana pakati Guelphs uye Ghibellines, chivako akanga chikamu akadzorerwa uye chikamu akavakazve. Between 1307 uye 1312 nechiso rakapera, colonnades vakavakazve pamwe capitals uye matronei.
1155 Kukurukurirana