The only specimen of this artist’s work we know of in Siena, is that on the Pavement. We have no other record of him except that in 1405, or perhaps even earlier, he was working at Orvieto, in company with a certain Nanni di Giacomo (a cadet of the noble house of Castori, or Amidei), a native of Lucca, but resident in Siena, and during the next year, with an artist named Orbetano, called il Mastro, also a Sienese.