How old was Donatello when he worked for Ghiberti?
Ghiberti started creating his first set of doors for the baptistry in Florence in 1403. We know that during this work (which lasted until 1424) Donatello and quite a few other Florentine artists assisted him. Donatello was born in 1386, so when work on the doors was started, Donatello was 17. It is not known, though, at what point Donatello joined the work force.
