Reputed to be the wealthiest man in 11th century England–wealthier even than the King–Aaron of Lincoln was a hugely successful moneylender whose achievements included the financing of many cathedrals. His story, while exceptional in terms of scope, is nevertheless instructive of the Jewish experience in the medieval economy as a whole. Part of the Jewish Biography as History series by Dr. Henry Abramson (more lectures available at henryabramson.com).