Construction of the Basilica di San Petronio began in 1390, but renovations to enlarge the building were interrupted in the 1500s when its size threatened to overshadow St. Peter’s Basilica in Rome. The basilica’s façade was unfortunately left unfinished, but the interiors are beautifully realized, including the Cappella dei Magi, with sumptuous frescoes by Giovanni da Modena, rich stained glass, elegant carved marble, and the astronomer Cassini’s brass meridian line embedded in the floor of the eastern aisle. Visitors also enjoy panoramic views over the city from the terrace on the church roof, and stroll through the basilica’s museum to see precious artifacts, illuminated manuscripts, and vestments belonging to the church.
Basilica di San Petronio is the most important church in Bologna, and a highlight of any city walking or bike tour, along with attractions like Piazza Maggiore, the Two Towers, and the churches of Santo Stefano and San Domenico. Some travelers visit as part of a multi-day trip from Rome.