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Cesare Borgia (September 13, 1475 – March 12, 1507), Duke of Valentinois was a Spanish-Italian...

Cesare Borgia (September 13, 1475 – March 12, 1507), Duke of Valentinois was a Spanish-Italian condottiero, lord and cardinal. He was the son of Pope Alexander VI and his long-term mistress Vannozza dei Cattanei, sibling to Lucrezia Borgia, Gioffre Borgia (Jofré in Valentian), Prince of Squillace, and Giovanni Borgia, duke of Gandia, and half-brother to Don Pedro Luis de Borja and Girolama de Borja, children of unknown mothers. Like nearly all aspects of Cesare Borgia's life, the date of his birth is a subject of dispute. However, it is accepted that he was born in Rome either in 1475 or 1476 to Cardinal Rodrigo de Lanzol y Borja, soon to become Pope Alexander VI, and his mistress Vannozza de' Cattanei, of whom documents are sparse. The Borgia family originally came from Spain and rose to prominence during the mid 15th century, when Cesare's great uncle Alonso Borgia (1378-1458), bishop of Valencia, was elected Pope Callixtus III in 1455. Cesare's father, Pope Alexander VI, was the first pope who openly recognised to have children with a lover. Stefano Infessura writes that Cardinal Borgia falsely claimed Cesare to be the legitimate son of another man, the nominal husband of