Among the close associates of Piero di Cosimo de' Medici and his illustrious son, Lorenzo de' Medici, no one was more trusted by both father and son than Francesco Sassetti, their business partner and general manager. Yet Sassetti is virtually unknown to English readers. Like the Medici, he belonged to a noble Florentine family whose wealth originated in trade and was later re-invested in landed property in the city of Florence and the surrounding country.