Michelangelo
Michelangelo returned to Florence in 1499. The republic was changing after the fall of its leader, anti-Renaissance priest Girolamo Savonarola, who was executed in 1498, and the rise of the "gonfaloniere" Piero Soderini. Michelangelo was asked by the consuls of the Guild of Wool to complete an unfinished project begun 40 years earlier by Agostino di Duccio: a colossal statue of Carrara marble portraying David as a symbol of Florentine freedom to be placed on the gable of Florence Cathedral. Michelangelo responded by completing his most famous work, the statue of David, in 1504. The masterwork definitively established his prominence as a sculptor of extraordinary technical skill and strength of symbolic imagination. A team of consultants, including Botticelli and Leonardo da Vinci, was called together to decide upon its placement, ultimately the Piazza della Signoria, in front of the Palazzo Vecchio. It now stands in the Academia while a replica occupies its place in the square.
Michelangelo
In 1513, Pope Julius II died and was succeeded by Pope Leo X, the second son of Lorenzo dei Medici. Pope Leo commissioned Michelangelo to reconstruct the façade of the Basilica of San Lorenzo in Florence and to adorn it with sculptures. He agreed reluctantly and spent three years creating drawings and models for the façade, as well as attempting to open a new marble quarry at Pietrasanta specifically for the project. In 1520 the work was abruptly cancelled by his financially strapped patrons before any real progress had been made. The basilica lacks a façade to this day.