This Day in Christian History: December 10
December 10, 1520: Martin Luther Burns the Papal Bull of Excommunication
For Martin Luther's defiance of the Catholic church, and his heresies such as "the just shall live by faith", Pope Leo X issued to him a Papal Bull pronouncing him a heretic and ordering him to recant his teachings, or be severed from the Roman church.
Luther reacted by publically burning the Bull, as well as many other books by his enemies, outside the gates of Wittenburg Germany where the Luther Oak stands today.
As the flames licked towards the sky, he is said to have yelled above the crackling flames, "Because you, godless book, have grieved or shamed the holiness of the Father, be saddened and consumed by the eternal flames of Hell".
This act was the final straw, and Rome excommunicated Martin Luther less than a month later.