Naming the worst of the Borgias is a tricky business, so great is the choice. Juan Borgia, however, is right up there at the top of the list; a spoilt, arrogant, debauched, cruel brat with hundreds of enemies who also happened to be the favourite son of Pope Alexander VI - rather better known to history as the infamous despot Rodrigo Borgia. So when Juan showed up dead in 1497, the Pope was beside himself with grief - and surrounded by a whole team of people who had the desire, the motive and the wherewithal to get rid of Juan once and for all. But which one actually did it?