The Rondanini Pietà is a marble sculpture that Michelangelo worked on from the 1550s until the last days of his life, in 1564. It is housed in the Museum of Ancient Art of Sforza Castle in Milan. This final sculpture revisited the theme of the Virgin Mary mourning over the body of the dead Christ, which he had first explored in his Pietà of 1499. Like his late series of drawings of the Crucifixion and the sculpture of the Deposition of Christ intended for his own tomb, it was produced at a time when Michelangelo's sense of his own mortality (and with it his spirituality) was growing.