From Wikipedia

Great Artists of the Italian Renaissance
Lecture Nine

Donatello and Padua

In 1443, Donatello was called to Padua by the heirs of the famous condottiero Erasmo da Narni, who had died that year. Completed in 1450 and placed in the square facing the Basilica of St. Anthony, his equestrian statue of Erasmo (better known as the Gattamelata, or "Honey-Cat") was the first example of such a monument since ancient times. (Other equestrian statues, from the 14th century, had not been executed in bronze and had been placed over tombs rather than erected independently, in a public place.) This work became the prototype for other equestrian monuments executed in Italy and Europe in the following centuries.

For the Basilica of St. Anthony, Donatello created, most famously, the bronze Crucifix of 1444–1447 and additional statues for the choir, including a Madonna with Child and six saints, constituting a Holy Conversation, which is no longer visible since the renovation by Camillo Boito in 1895. The Madonna with Child portrays the Child being displayed to the faithful, on a throne flanked by two sphinxes, allegorical figures of knowledge. On the throne's back is a relief of Adam and Eve. During this period—1446–50—Donatello also executed four extremely important reliefs with scenes from the life of St. Anthony for the high altar.