Lorenzo di Piero de' Medici (Italian pronunciation: [loˈrɛntso di ˈpjɛːro de ˈmɛːditʃi]; 12 September 1492 – 4 May 1519) was the ruler of Florence from 1516 until his death in 1519. He was also Duke of Urbino during the same period. His daughter Catherine de' Medici became Queen Consort of France, while his illegitimate son, Alessandro de' Medici, became the first Duke of Florence.