I knew that reform was going to be a big theme going into the series, but as it went on it became clear that it was in a sense the only theme -- the entire Renaissance, whether conciliarist or papalist or Protestant, was obsessed with the idea. Thus I've subtitled the whole series, 'A Study in Reform'.
At some point in the series I got off-count with the number of popes, so I've corrected that here.
8. Innocentius VIII (1484-1492)
10. Pius III (1503)
12. Leo X (1513-1521) [Part I]