Don Pietro de' Medici was the youngest son of Cosimo I de' Medici, Grand Duke of Tuscany and Eleonora di Toledo.
Early in 1571 he went to Rome and in the spring of 1575 he went to Venice. Wikipedia
Born: June 3, 1554, Florence, Italy
Died: April 25, 1604 (age 49 years), Madrid, Spain
Great-grandparents: Lucrezia de' Medici, Giovanni il Popolano, Jacopo Salviati, and more
Parents: Cosimo I de' Medici and Eleanor of Toledo
Partner: Eleonora di Garzia di Toledo
Grandparents: Maria Salviati, Pedro de Toledo y Zúñiga, Giovanni delle Bande Nere, and more