The
Medici Chapels (
Cappelle medicee) are two structures at the
Basilica of San Lorenzo, Florence, Italy, dating from the 16th and 17th centuries, and built as extensions to
Brunelleschi's 15th-century church, with the purpose of celebrating the
Medici family, patrons of the church and
Grand Dukes of Tuscany. The
Sagrestia Nuova, ("New Sacristy"), was designed by
Michelangelo. The larger
Cappella dei Principi, ("Chapel of the Princes"), though proposed in the 16th century, was not begun until the early 17th century, its design being a collaboration between the family and architects.