It is an important Italian Romanesque cathedral: the dome, in particular, is decorated by a highly influential illusionistic fresco by Renaissance painter Antonio da Correggio.
After a fire destroyed the early Christian basilica in August 1058, Bishop Cadalo broke ground for a new cathedral in a different place;[1] the building was consecrated by Paschal II in 1106.
The wide façade, made from blocks of sandstone, was completed in 1178: it has three loggia floors and three portals, whose doors were sculpted by Luchino Bianchino in 1494.
The Gothic belfry, topped by a gilt copper angel, was added later, in 1284-1294:[4] a twin construction on the left side had been conceived, but it was never begun.
This culminates in the apse, frescoed with ‘’Christ, Mary, Saints, and Angels in Glory’’ (1538–1544) by Girolamo Mazzola Bedoli.
The Crypt has a monument to Saint Bernardo di Uberti, bishop of Parma 1106–1133, patron of the diocese.