Interesting story of Alexander the VI: http://www.eyewitnesstohistory.com/alexanderVI.htm
"The new Pope loved the good life. He sired at least twelve children through a number of mistresses. The most famous of his offspring were his son Cesare, noted for the murder of political rivals, and his daughter Lucrezia who was married off to a number of husbands for political gain."
I wonder if there is an accurate record of the whereabouts of all of his children.
Some day I hope to find an answer to the above discussion, but for now, I'm okay with not knowing.