Cosimo de' Medici
Lorenzo's grandfather, Cosimo de' Medici, was the first member of the Medici family to lead the Republic of Florence and run the Medici Bank simultaneously. As one of the wealthiest men in Europe, Cosimo spent a very large portion of his fortune on government and philanthropy, for example as a patron of the arts and financier of public works. Lorenzo's father, Piero di Cosimo de' Medici, was equally at the centre of Florentine civic life, chiefly as an art patron and collector, while Lorenzo's uncle, Giovanni di Cosimo de' Medici, took care of the family's business interests. Lorenzo's mother, Lucrezia Tornabuoni, was a writer of sonnets and a friend to poets and philosophers of the Medici Academy. She became her son's advisor after the deaths of his father and uncle.