One of the economic factors which led to the Reformation is that the monarchs thought they should control church properties. True False

On October 31, 1517, German scholar Martin Luther is said to have nailed his argument against the Catholic Church's sale of better treatment after death to a church door in Wittenberg.

Whether this actually happened is disputed, but what's not disputed is that his "95 Theses" quickly spread debate through Europe and led to an irrevocable split in Western Christianity.

Luther's influence can still be felt - he's been credited with the rise of secular democracy, among other things - but it was theology that he was concerned about.

If all you know about the Reformation are references on The Simpsons, read on to find out why Luther disagreed with the Catholic Church.