Basilica di San Petronio, Bologna

The Basilica di San Petronio is a monumental Gothic basilica in Bologna's Piazza Maggiore, dedicated to Bishop Petronio (5th century), patron saint of Bologna. Construction began in 1388 with an ambitious plan that would have exceeded St. Peter's Basilica in size, though the project remained incomplete. The basilica has been a central landmark of Bologna since 1390.