Donatello (1386 - 1466). Donato di Niccolò di Betto Bardi, better known as Donatello, was an Italian sculptor of the Renaissance. Born in Florence, he studied classical sculpture and used this to develop a complete Renaissance style in sculpture, whose periods in Rome, Padua and Siena introduced to other parts of Italy a long and productive career. He worked with stone, bronze, wood, clay, stucco and wax, and had several assistants, with four perhaps being a typical number. Though his best-known works were mostly statues in the round, he developed a new, very shallow, type of bas-relief for small works, and a good deal of his output was larger architectural reliefs. Donatello was the son of Niccolò di Betto Bardi, who was a member of the Florentine Arte della Lana, and was born in Florence, probably in the year 1386. Donatello was educated in the house of the Martelli family. He apparently received his early artistic training in a goldsmith's workshop, and then worked briefly in the studio of Lorenzo Ghiberti. While undertaking study and excavations with Filippo Brunelleschi in Rome, work that gained the two men the reputation of treasure seekers, Donatello made a living by working at goldsmiths' shops. Their Roman sojourn was decisive for the entire development of Italian art in the 15th century, for it was during this period that Brunelleschi undertook his measurements of the Pantheon dome and of other Roman buildings. Brunelleschi's buildings and Donatello's sculptures are both considered supreme expressions of the spirit of this era in architecture and sculpture, and they exercised a potent influence upon the artists of the age. In Florence, Donatello assisted Lorenzo Ghiberti with the statues of prophets for the north door of the Baptistery of Florence Cathedral, for which he received payment in November 1406 and early 1408. In 1409-1411 he executed the colossal seated figure of Saint John the Evangelist, which until 1588 occupied a niche of the old cathedral façade, and is now placed in the Museo dell'Opera del Duomo. This work marks a decisive step forward from late Gothic Mannerism in the search for naturalism and the rendering of human feelings. The face, the shoulders and the bust are still idealized, while the hands and the fold of cloth over the legs are more realistic. In 1411-1413, Donatello worked on a statue of St. Mark for the guild church of Orsanmichele. In 1417 he completed the Saint George for the Confraternity of the Cuirass-makers. The elegant St. George and the Dragon relief on the statue's base, executed in schiacciato is one of the first examples of one-point perspective in sculpture. From 1423 is the Saint Louis of Toulouse for the Orsanmichele, now in the Museum of the Basilica di Santa Croce. Donatello had also sculpted the classical frame for this work, which remains, while the statue was moved in 1460 and replaced by the Incredulity of Saint Thomas by Verrocchio. Between 1415 and 1426, Donatello created five statues for the campanile of Santa Maria del Fiore in Florence, also known as the Duomo. These works are the Beardless Prophet; Bearded Prophet; the Sacrifice of Isaac; Habbakuk; and Jeremiah; which follow the classical models for orators and are characterized by strong portrait details. From the late teens is the Pazzi Madonna relief in Berlin. In 1425, he executed the notable Crucifix for Santa Croce; this work portrays Christ in a moment of the agony, eyes and mouth partially opened, the body contracted in an ungraceful posture. From 1425 to 1427, Donatello collaborated with Michelozzo on the funerary monument of the Antipope John XXIII for the Battistero in Florence. Donatello made the recumbent bronze figure of the deceased, under a shell. In 1427, he completed in Pisa a marble relief for the funerary monument of Cardinal Rainaldo Brancacci at the church of Sant'Angelo a Nilo in Naples. In the same period, he executed the relief of the Feast of Herod and the statues of Faith and Hope for the Baptistery of San Giovanni in Siena. The relief is mostly in stiacciato, with the foreground figures are done in bas-relief. The dating of the statue is not settled, though recent scholarship has indicated it was made around 1460. It is certain that Cosimo de' Medici, the foremost art patron of his era, commissioned from Donatello the bronze David for the court of his Palazzo Medici. This is now Donatello's most famous work, and the first known free-standing nude statue produced since antiquity. Conceived fully in the round, independent of any architectural surroundings, and largely representing an allegory of the civic virtues triumphing over brutality and irrationality, it is arguably the first major work of Renaissance sculpture.