Donatello entered into a type of workshop partnership with Michelozzo in 1425. Both artists worked together right into the 1430s on a whole series of extensive projects which included the funeral monument to the anti-pope John XXIII. The overall design of the monument 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.

Preview	Picture Data	Info
	Funeral Monument to the Anti-pope John XXIII 1422-28 Gilded pietra serena, 713 x 200 x 213 cm Baptistery, Florence
	Funeral Monument to the Anti-pope John XXIII 1422-28 Gilded pietra serena, 713 x 200 x 213 cm Baptistery, Florence
	Funeral Monument to the Anti-pope John XXIII (detail) 1422-28 Gilded pietra serena Baptistery, Florence
	Funeral Monument to the Anti-pope John XXIII (detail) 1422-28 Gilded pietra serena Baptistery, Florence
	Funeral Monument to the Anti-pope John XXIII (detail) 1422-28 Gilded pietra serena Baptistery, Florence
	Funeral Monument to the Anti-pope John XXIII (detail) 1422-28 Pietra serena Baptistery, Florence
	Funeral Monument to the Anti-pope John XXIII (detail) 1422-28 Pietra serena Baptistery, Florence
	Funeral Monument to the Anti-Pope John XXIII (detail) 1422-28 Pietra serena Baptistery, Florence