The Italian artist Sassetta (ca. 1400-1450), the greatest painter of the Sienese school in the 15th century, is noted for the gentle piety of his art.

The place and date of birth of Stefano di Giovanni, known as Sassetta are unknown. He may have been born in Cortona, the home of his father, Giovanni di Consolo. A baptismal record preserved in Siena dated Dec. 31, 1392, for one Stefano di Giovanni is widely accepted as evidence that he was born in Siena that year. Some scholars, however, would suggest a birth date not before 1400 on the basis of Sassetta's earliest dated work of 1423.

Sassetta's style was wholly Sienese in character, suggesting that he was trained in the shop of some Sienese master. Whether or not that master was Paolo di Giovanni Fei, as suggested by some critics, is unknown. In 1440 Sassetta married Gabriella di Buccio di Biancardo. The eldest of...