Construction started in the 13th century but Arezzo's cathedral wasn't completed until the 15th century. In the northeast corner, left of the intricately carved main altar, is an exquisite fresco of Mary Magdalene (c 1459) by Piero della Francesca. Also notable are five glazed terracottas by Andrea della Robbia and his studio. Behind the cathedral is the pentagonal Fortezza Medicea (1502) atop the crest of one of Arezzo's two hills – the duomo was built on the crest of the other.
