(b Castiglione di Valdorcia, nr Siena, ?1380–85; d Perugia, 19 Sept 1417). Italian painter. He may have been a pupil of Paolo di Giovanni Fei and was influenced by Taddeo di Bartolo in his early works. However, the strongest influence on his art was Simone Martini. He is first recorded on 20 November 1409, when he was paid by the Opera del Duomo, Siena. He had overall responsibility for the fresco decoration of the three chapels in the sacristy of Siena Cathedral (March 1411–March 1412), one the most prestigious commissions in Siena at that date. There he worked with Gualtieri di Giovanni, Niccolò di Naldo and Giovanni di Bindino (b Siena, ?1380–85; d Siena, 9 Nov 1417), a group of painters sometimes called the Masters of the Sacristy of Siena Cathedral. His work has a lively narrative style and uses forceful characterization in such scenes as the Apparition of St Michael on Castel S Angelo in the chapel of the Reliquary. He also painted the reliquary cupboard (1412; Siena, Mus. Opera Duomo) for the sacristy. Between November 1415 and November 1416 he painted the frescoes in the chapel of SS Catherine and Peter Martyr in S Domenico, Perugia. Other works attributed to him include the fresco of the Assumption of the Virgin (Siena, S Niccolò del Carmine), the Virgin and Child with SS Andrea and Onofrio (Siena, Pin. N., 140), St Lucy (Minneapolis, MN, Inst. A.) and the Annunciation (New York, Cathedral of St John the Divine).