NANNI di BARTOLO, known as the ROSSO. - Florentine sculptor active in the first half of the 15th century.
In 1419 he received the commission for a statue for the façade of S. Maria del Fiore; in 1421 he completed the statue of Joshua begun for the campanile by L. Ciuffagni, and in 1422 one of Obadiah for the campanile. Meanwhile, in 1421 he had been commissioned together with Donatello to execute a group depicting the Sacrifice of Isaac, likewise intended for the campanile. In 1423 N. was in Venice; he is then found in Verona, where between 1423 and 1439 he executed the Brenzoni monument in S. Fermo. Between 1432 and 1435 he was also in Tolentino to work on the portal of the church of S. Nicolò there.
An uncertain personality, variously susceptible to influence, N. appears in his early works still inclined toward Gothic modes, immediately tempered through contact with Donatello, but resumed when in the Veneto he came under local influence, to the point of seeming almost to have forgotten his youthful Florentine experiences.