In 1520 the Medici came back to Michelangelo with another grand proposal, this time for a family funerary chapel in the Basilica of San Lorenzo.[35] Fortunately for posterity, this project, occupying the artist for much of the 1520s and 1530s, was more fully realized. Michelangelo used his own discretion to create its composition of the Medici Chapel. It houses the large tombs of two of the younger members of the Medici family, Giuliano, Duke of Nemours, and Lorenzo, his nephew, but it also serves to commemorate their more famous predecessors, Lorenzo the Magnificent and his brother Giuliano who are buried nearby. The tombs display statues of the two Medici and allegorical figures representing Night and Day, and Dusk and Dawn. The chapel also contains Michelangelos Medici Madonna.[40] In 1976 a concealed corridor was discovered with drawings on the walls that related to the chapel itself.[41][42]