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Early career

Donatello's first appearance in any documentary records is unpromising; in January 1401, at the age of about 15, he was accused in Pistoia, 25 miles from Florence and then controlled by it, of hitting a German with a stick, drawing blood. He was probably there with his father, who had an official job in Pistoia at the time, while Buonaccorso Pitti was the Captain, or governor. While there Donatello appears to have befriended, and perhaps worked with, Filippo Brunelleschi, who was some ten years older (born in 1377), and although not yet a master goldsmith, working on silver figures for an altar in Pistoia Cathedral. What experience Donatello had to assist him, if that was what he was doing, is unclear.

Both Donatello and Brunelleschi returned to Florence in early 1401, in time for Brunelleschi to take part in the famous competition for the Baptistery doors, often seen as the start of Florentine Renaissance sculpture. Seven sculptors were invited to submit trial panels, for which they were paid; Vasari's Life of Brunelleschi wrongly claims that Donatello was one of them, but they were all more experienced figures. Following Vasari and Brunelleschi's biographer Antonio Manetti, the unexpected result declared by the 34 judges was that the entries by two young Florentines, Lorenzo Ghiberti and Brunelleschi, were the best. An attempt was made to get the two to share the commission, but amid bitter recriminations that lasted for years, this failed and Ghiberti was given the whole commission. Ghiberti himself on the other hand (and the only contemporary voice) claimed in his Commentarii that the vote went unanimously for him, including the competing artists.

Any part played by the adolescent Donatello, presumably assisting Brunelleschi with his trial piece, is unknown. After the final result in late 1402, or early 1403, they seem to have left for Rome together, staying until at least the next year, to study the artistic and architectural remains left by Ancient Rome, then very abundant, though for the most part still buried. They were very early in this effectively archaeological pursuit, which included measuring remains, and hiring labourers to excavate. The main source for this period is the biography of Brunelleschi by Antonio Manetti (1423–1497), who knew both men, but it was written after their deaths in the 1470s.

Vasari just repeats a shorter version of Manetti's account, according to which both men were able to support themselves by jobs for Roman goldsmiths, which probably represented important training for Donatello. Perhaps they were also able to sell excavated sculptures. Brunelleschi subsequently became a highly important architect, while Donatello began his career in sculpture.

Donatello is recorded as working as an apprentice, and for the last few months on a salary, in the studio of Lorenzo Ghiberti in 1404–1407, apparently working on the workshop's main project, the bronze doors of the Florence Baptistery, and from 1406 on he began stone carving at the cathedral for the Porta della Mandorla on its north side, a large project that was still some years from completion. He was paid in November 1406 for a figure of a prophet on the door, most probably the one for the left pinnacle (now in the Museo dell' Opera del Duomo, the cathedral museum).