The upper part on both sides of the nave, badly damaged by the earthquake of 1997, was decorated in two rows with in total 32 scenes from the Old Testament (starting with "Creation of the World" and ending with "Joseph forgives his brothers") and the New Testament (from the "Annunciation" to "The Women at the Tomb"), while the upper register of the entrance wall is covered with two frescoes "Pentecost" and "Ascension of Jesus". Since it took about six months to paint one bay of the nave, different Roman and Tuscan masters, followers of Cimabue, have performed this series of scenes such as Giacomo, Jacopo Torriti and Pietro Cavallini.