The main events of the Diet of Worms relating to Luther took place from 16 to 18 April 1521. This year marks the 500thanniversary of the Diet of Worms, and on this occasion, we welcome Dr. Herman Selderhuis to rehearse the events of the diet and share his thoughts about its enduring significance for the church. The Diet of Worms of 1521 was a formal deliberative assembly of the Holy Roman Empire called by Emperor Charles V and conducted in the city of Worms. Martin Luther was summoned to the Diet in order to renounce or reaffirm his views in response to a Papal bull of Pope Leo X. Luther defended these views and refused to recant them. At the end of the Diet, the Emperor issued the Edict of Worms, condemning Luther and banning citizensfrom propagating his ideas. Dr. Herman Selderhuis is Professor of church history and church polity at the Theological University of Apeldoorn and the President of The International Congress on Calvin Research.