The Cathedral Museum was opened in 1930 under the direction of Giuseppe Agnelli, and its original home was a large room located on the second floor of the cathedral, above the atrium. Already after only a few years, the venue proved to be inadequate, but it was only in the 2000s that it was possible to move it to its current location, namely the ancient church of San Romano and its former convent, which was restored and partially rebuilt.
The museum displays the extraordinary collections of the Ferrara bishopric from the time when it was still in Voghenza, before 1135.
Highlights include the Renaissance illuminated manuscripts, the carved panels of the Door of the Months, dating back to the 13th century, the statue of the Madonna of the Pomegranate by Jacopo della Quercia, and the extraordinary organ doors with the stories of the Annunciation and St. George and the Dragon, painted by Cosmè Tura, founder of the Officina Ferrarese.