(b Siena; fl 1290; d Orvieto, June 1330). Italian architect and ?sculptor. The first documentary reference to him occurs in a Sienese catasto (land registry declaration) of 1290. He was appointed universalis caput magister of Orvieto Cathedral in a contract drawn up on 16 September 1310, which required him to supervise the construction of the cathedral, as well as oversee the town's bridges and other civic structures. He spent the last two decades of his life at Orvieto, apart from a few periods of service elsewhere as an architectural consultant.
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