1374 – Born in Siena, Italy. Influential early Renaissance sculptor.
1394 – He made an equestrian statue of Gian Tedesco.
1402 – He was one of six artists who submitted designs for the great gates of the baptistery, in which competition Lorenzo Ghiberti was the victor.
1406 – He executed one of his finest works, the monument of Ilaria del Caretto, wife of Paolo Guinigi.
1409 – He was engaged in negotiations which resulted in his acceptance of the commission for the famous Fonte Gaia, at Siena.
1425 – He returned to Siena, and in March undertook the contract for the doors of S. Petronio, Bologna.
1430 – He finished the great font of S. Giovanni at Siena, contributing himself only one of the bas-reliefs, "Zacharias in the Temple", the others being by Ghiberti, Donatello and other sculptors.
1438 – Died on October 20th in Bologna, Italy.