The Basilica di San Petronio dominates Bologna’s Piazza Maggiore and is one of the largest brick churches in the world, its facade famously left unfinished. A ticketed lift carries visitors up to the panoramic terrace on the roof, which offers sweeping views over the terracotta rooftops, the Two Towers and the surrounding hills. Inside, the vast Gothic nave holds the world’s longest meridian sundial, making a visit both a cultural and a scenic highlight of the city centre.