Funeral Monument to the Anti-pope John XXIII (detail)
by MICHELOZZO DI BARTOLOMEO, Pietra serena
The Funeral Monument to John XXIII was the result of a cooperation between Donatello and Michelozzo. The overall design is from Donatello, but in the execution he was heavily assisted by Michelozzo. The bronze effigy is certainly by Donatello, the marble reliefs of the Madonna with Child and the Virtues are by Michelozzo.