This thinker's controversial ideas earned him excommunication in the papal bull Decet Romanum Pontificem, and another of his works prompted the papal bull Exsurge Domine. His work On the Freedom of a 
This thinker's controversial ideas earned him excommunication in the papal bull Decet Romanum Pontificem, and another of his works prompted the papal bull Exsurge Domine. His work On the Freedom of a Christian theorized the doctrine of salvation by faith alone, and in another more political work, he condemned the sale of indulgences. For 10 points, name this philosopher and theologian who sparked the Protestant Reformation with the publication of his Ninety-Five Theses.
This thinker's controversial ideas earned him excommunication in the papal bull Decet Romanum Pontificem, and another of his works prompted the papal bull Exsurge Domine.
Martin Luther