Michelangelo worked on the funerary monuments dedicated to Giuliano de’ Medici, duke of Nemours, and his nephew Lorenzo de’ Medici, duke of Urbino, sculpting three incredible sculptures for each: the Allegories of Time, spread out above the tombs, and portraits of the Dukes. Sculptures representing Day and Night are found on Giuliano’s tomb, while Dawn and Dusk are on Giuliano’s. In the center of the chapel is an additional Michelangelo sculpture known as the Medici Madonna, depicting the Virgin Mary holding Jesus. Both Lorenzo il Magnifico and his brother Giuliano de’ Medici are buried under the altar, but Michelangelo did not have enough time to complete tombs for them.
The sumptuous Chapel of the Princes, built between 1604 and 1640 by the architect Matteo Nigetti, following a plan by Don Giovanni de’ Medici, was intended to highlight the Medici dynasty’s prestige and status on the Tuscan throne—just look to its grand dome and interior, lavishly decorated with precious marbles. The octagonal room, built to house the grand dukes’ remains, is covered nearly wall to wall in pietre dure (precious stone) and marble, with grand sarcophagi complete with bronze statues within their niches.