After Martin Luther posted his Ninety-Five Theses on October 31, 1517, the world would never be the same. The biblical truth that we are justified by faith alone in Christ alone would be heard once again, and lives would be transformed. Last year, Ligonier commemorated the anniversary of this historic event during its Reformation 500 Celebration. R.C. Sproul, Sinclair Ferguson, Stephen Nichols, Burk Parsons, and Derek Thomas explored the Reformation in brief messages that highlighted the gospel, what it means to have peace with God, the historical setting of the Reformation, and more.