Italian illuminator. He joined the Camaldolese order at the monastery of Santa Maria degli Angeli, Florence in 1348 at the tender age of nine. He professed his vows at the age of thirteen, after a four-year novitiate. He became Prior in 1398. The importance of the scriptorium was noted by Vasari in his Vita of Lorenzo Monaco; the latter's entry into the monastery in 1391 completed a triumvirate of painters, Don Silvestro, the eldest painter in the group, Don Simone Camaldolese and Don Lorenzo, that constituted the most important late medieval school of painters in Florence. Based on the evidence of his mature paintings, it seems very likely that his career before 1362 was not centred upon Santa Maria degli Angeli in Florence but upon Siena, where he might have been trained as a painter in Jacopo di Mino del Pellicciaio's workshop. //