The city's imposing Romanesque cathedral, rebuilt after an earthquake in the 12th century, contains magnificent works by Antelami and Correggio, and there are sculptures by Antelami and others of his school in the nearby baptistery (1196-1260). The church of San Giovanni Evangelista (1494-1510) has frescoes by Correggio and arabesques by Michelangelo Anselmi. The 16th-century abbey of San Paolo, with the Camera della Badessa (Room of the Abbess), has been splendidly decorated by Correggio.
You can find more information on the Parma cathedral in the Wikipedia.
Recommended viewing from the collection:
The Web Gallery of Art contains 54 images of artworks from the Parma Cathedral, Baptistry, and San Giovanni Evangelista.