Question: The sculpture of David was created by which artist on a commission from the Medici?
About the article "David (Michelangelo)", section "Interpretation".

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The bronze sculpture Judith and Holofernes (1460), created by Donatello at the end of his career, can be seen in the Hall of Lilies (Sala dei Gigli), in the Palazzo Vecchio, Florence, Italy.
A copy stands in one of the sculpture's original positions on the Piazza della Signoria, in front of the Palazzo Vecchio.
It depicts the assassination of the Assyrian general Holofernes by Judith and is remarkable for being one of the first Renaissance sculptures to be conceived in the round, with its four distinct faces.
The statue was commissioned by Cosimo de' Medici as a decoration for the fountain in the garden of the Palazzo Medici-Riccardi.
It stood in this palace together with Donatello's "David", standing in the courtyard, both depicting tyrant slayers.
These two statues are among the earliest freestanding bronze Italian Renaissance statues conceived "in the round".
Judith is considered the symbol of liberty, virtue and victory of the weak over the strong in a just cause.
She stands powerful with raised sword, holding the head of Holofernes by his hair.
The statue was originally gilded and its shine in the sunlight must have made the onlookers stare at it; some gilding remains on the sword.
To facilitate the gilding the bronze was cast in 11 parts.
The base of the sculpture resembles a cushion, a naturalistic device first used by Donatello for his "St. Mark" in the Orsanmichele.
It is believed that an inscription on the granite pedestal originally read, "Kingdoms fall through luxury , cities rise through virtues.
Behold the neck of pride severed by the hand of humility."
This dramatic and detailed statue is thus a metaphor of the Medici rule, as the defenders of Florentine liberty, akin to Judith, slayer of the tyrant Holofernes and defender of the people.
This view is supported by accounts that mention a second inscription on the pedestal which read, "The salvation of the state.
Piero de' Medici son of Cosimo dedicated this statue of a woman both to liberty and to fortitude, whereby the citizens with unvanquished and constant heart might return to the republic."
Inscribed on the cushion are the words OPVS .
DONATELLI .
FLOR (the work of the Florentine, Donatello), this being the only surviving signed work by the artist.
In 1495, the sculpture was placed on the Piazza della Signoria, at the side of main door the Palazzo Vecchio, in memory of the expulsion of Piero di Lorenzo de' Medici from Florence and the introduction of the Florentine republic under Girolamo Savonarola.
This time, this statue symbolized the expulsion of the tyrannical Medici.
The statue was later moved to the courtyard inside the Palazzo Vecchio, and still later into the Loggia dei Lanzi.
In 1919, it was then placed on the left side of the Palazzo Vecchio.
It was replaced by a bronze copy in 1988 and the original, after restoration, was given a final place in the Sala dei Gigli inside the Palazzo Vecchio. 
Lift Off is a public artwork by American artist David Black, located at the CityVista Condominium at the intersection of 5th St NW & K St NW in Washington, D.C., United States.
"Lift Off" was created through DC Commission on the Arts and Humanities. 
Giusto Utens or Justus Utens (died 1609) was a Flemish painter who is remembered for the series of Medicean villas in lunette form that he painted for the third grand duke of Tuscany, Ferdinando I, in 1599–1602.
He moved to Carrara about 1580, where he married, and where later he returned and died.
The Medici villas illustrated by Utens from a bird's-eye perspective are: Villa Medici del Trebbio Villa Medicea di Cafaggiolo Palazzo Pitti, the Boboli Gardens and Fort Belvedere Villa Medici di Castello Villa Medici La Petraia Villa Medicea di Pratolino Villa Medici dell'Ambrogiana Villa Medici di Lappeggi Villa Medici di Poggio a Caiano Villa Medici di Serravezza Villa Medici La Magia Villa Medici di Marignolle Villa Medici di Montevettolini Villa Medici di Colle Salvetti The three missing lunettes are thought to be the Villa di Artimino and perhaps the Villa Medici di Careggi.
In the early twentieth century an anonymous artist completed the scheme, based on eighteenth-century "vedute" illustrating the villa at Careggi, that at Cerreto Guidi and Poggio Imperiale, which in the sixteenth century was still the Villa di Poggio Baroncelli. 
Battle of the Centaurs is a relief by Italian Renaissance artist Michelangelo, created around 1492.
It was the last work Michelangelo created while under the patronage of Lorenzo de' Medici, who died shortly after its completion.
Inspired by a classical relief created by Bertoldo di Giovanni, the unfinished marble sculpture depicts the mythic battle between the Lapiths and the Centaurs.
A popular subject of art in ancient Greece, the story was suggested to Michelangelo by the classical scholar and poet Poliziano.
"Battle of the Centaurs" was a remarkable sculpture in several ways, presaging Michelangelo's future sculptural direction.
Michelangelo had departed from the then current practices of working on a discrete plane to work multidimensionally.
It was also the first sculpture Michelangelo created without the use of a bow drill and the first sculpture to reach such a state of completion with the marks of the subbia chisel left to stand as a final surface.
Whether intentionally left unfinished or not, the work is significant in the tradition of "non finito" sculpting technique for that reason.
Michelangelo regarded it as the best of his early works, and a visual reminder of why he should have focused his efforts on sculpture. 
Tip is a public art work by American artist David Middlebrook, located in the Riverwest neighborhood north of downtown Milwaukee, Wisconsin.
The sculpture was created for Gordon Park as part of a revitalization initiative.