c1399 Born in Siena.
1417 Giovanni receives payment for miniatures in a Book of Hours commissioned by a Milanese professor of law.
1420 Receives payments for two untraced paintings, both for religious houses in Siena. This suggests Giovanni is an established artist by this date.
Early 1420s Paints four altarpieces for S. Domenico, Siena.
1428 Joins the painters’ guild in Siena.
1438-44 Works on illustrations for Dante’s Divine Comedy.
1441 He is appointed the rector of the Sienese painters’ guild.
1449 Completes an altarpiece commissioned for the church of S. Maria della Scalla in Siena.
1463 Paints an altarpiece for the cathedral at Pienza.
1475 Produces his last dated work – an altarpiece for the church of S. Silvestro di Staggia in Siena.
1482 Dies in Siena.
1435 Madonna of Humility, Siena, Pinacoteca Nazionale
1440 St Michael the Archangel, Vatican, Pinacoteca Vaticana
1445 The Creation of the World and the Expulsion from Paradise, New York, Metropolitan Museum of Art
c1453 The Birth of St John the Baptist, London, National Gallery
c1453 St John the Baptist retiring to the Desert, London, National Gallery
c1453 The Baptism of Christ, London, National Gallery
c1453 The Feast of Herod, London, National Gallery
1456 St Jerome Appearing to St Augustine, Berlin, Staatliche Museen
1460 St Catherine before the Pope at Avignon, Madrid, Museo Thyssen-Bornemisza
1462 The Adoration of the Magi, New York, Metropolitan Museum
1475-82 The Feast of Herod, London, National Gallery