Three walls retain much of the fresco decoration of the 15th century, damaged and restored. Among all the most remarkable are the frescoes of the Annunciation, Crucifiction and Saints and fragmentary figures in the upper wall. Some, dating to around the mid-15th century, show similarities to frescoes of the Church of Santa Maria Assunta in Vallo di Nera, connected to the Maestro di Eggi. On the same wall, to the right of the door leading into a small adjoining room are Christ in glory with angels bearing symbols of the passion and the Archangel St. Michael and praying figures of the 15th century. In the small room on the right, frescoes from the end of the 14th century: Scenes of the passion; a good quality St. Catherine and holy martyr by the same hand. In the monastery, in a downstairs room  is a Universal Judgement with Christ as judge in a mandorla; Mary, the apostles, the damned and the donor, a fresco of the first half of the 15th century. 

 

Source: http://www.cerretodispoletoturismo.it