The New Sacristy began with two Medici popes. Cardinal Giulio de' Medici, who later became Pope Clement the Seventh, and his cousin Pope Leo the Tenth wanted a mausoleum for members of their family. It was meant to hold the tombs of Lorenzo the Magnificent and his brother Giuliano, and also of their heirs, Lorenzo, Duke of Urbino, and Giuliano, Duke of Nemours. The deaths of those two young dukes brought the Magnificent's branch of the family to an end. The architecture was a statement as well as a tomb. The New Sacristy balances Filippo Brunelleschi's Old Sacristy, which sits beside the left transept of San Lorenzo, and it consciously competes with it. Both share the same format, a cubical space topped by a dome, with gray pietra serena stone set against whitewashed walls. Michelangelo took Brunelleschi's calm vocabulary and pushed it further. This was Michelangelo's first venture into architecture, and the building was designed and completed between 1519 and 1524. When you stand inside, remember that you are looking at a painter and sculptor's very first answer to the question of what a building could be.