architect; b. about 1275; d. June, 1330.
In 1310 he appears first as capomaestro of the cathedral of Orvieto, Italy (begun in 1290). The fašade was probably begun at this time. July 13, 1319, he was called to Perugia to superintend public works, especially the fortifications. The Porta di S. Fortunato at Todi is traditionally attributed to him. In 1322 he assisted as an adviser at the cathedral of Siena. September 11, 1327, he was again at Perugia.