Reggio Emilia Cathedral is one of the three main religious buildings in the administrative region that has what city as its capital?
Reggio Emilia Cathedral: Reggio Emilia Cathedral (Italian: "Duomo di Reggio Emilia; Cattedrale di Santa Maria Assunta" ) is a Roman Catholic cathedral (and one of the three main religious buildings) in Reggio Emilia (Emilia-Romagna, northern Italy). Emilia-Romagna:  Its capital is Bologna.
Bologna