In the basement of the basilica, the recently restored environment once the seat of the Compagnia del Santissimo Sacramento, now houses the first nucleus of the San Lorenzo Treasure Museum where you can admire the splendid objects that over the centuries have constituted liturgical furnishings and precious reliquaries of the basilica.
In addition to the Museum of the Treasure, in the basement of the Basilica it is possible to see the burial of Giovanni di Bicci, the monumental tomb of Cosimo the Elder and a tombstone in honor of Donatello.
From December 2014, the basement was then enriched with a new room dedicated to the display of five tables with drawings by Jacopo
da Pontormo.