This is a biography of Cesare Borgia written by William Harrison Woodward (1856 – 1941). Cesare Borgia (César Borja) 13 September 1475 or April 1476 – 12 March 1507, was an italian politician condottiero, nobleman, politician, and cardinal. He was the son of Pope Alexander VI (r. 1492–1503) and his long-term mistress Vannozza dei Cattanei. Although he was an immensely capable general and statesman, Cesare would have trouble maintaining his domain without continued Papal patronage. Cesare Borgia briefly employed Leonardo da Vinci as military architect and engineer between 1502 and 1503.