In 2017, Salvator Mundi by Leonardo Da Vinci set a world record by selling for $450m, the highest ever-paid for a work of art, certainly for one that had only recently turned up at auction. Historian Yuri Felshtinsky shows that this was only a small detail in its convoluted, far stranger story of high finance, which involves Donald Trump's election campaign, Saudi Arabia's de facto leader MBS, Swiss investigators, and Monaco's football czar, a...