WEBCesare as a boy, painted by Pinturicchio. Like many aspects of Cesare Borgia's life, the date of his birth is a subject of dispute. He was born in Subiaco in Lazio, Italy in either 1475 or 1476, the illegitimate son of Cardinal Roderic Llançol i de Borja, usually known as "Rodrigo Borgia", later Pope Alexander VI, and his Italian mistress Vannozza dei …