Concept
The Diet of Worms of 1521 (Reichstag zu Worms ˈʁaɪçstaːk tsuː ˈvɔʁms) was an imperial diet (a formal deliberative assembly) of the Holy Roman Empire called by Emperor Charles V and conducted in the Imperial Free 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. In answer to questioning, he defended these views and refused to recant them. At the end of the Diet, the Emperor issued the Edict of Worms (Wormser Edikt), a decree which condemned Luther as "a notorious heretic" and banned citizens of the Empire from propagating his ideas. Although the Protestant Reformation is usually considered to have begun in 1517, the edict signals the first overt schism. The diet was conducted from 28 January to 25 May 1521 at the Heylshof Garden, with the Emperor presiding. Other imperial diets took place at Worms in the years 829, 926, 1076, 1122, 1495, and 1545, but unless plainly qualified, the term "Diet of Worms" usually refers to the assembly of 1521. In June 1520, Pope Leo X issued the Papal bull Exsurge Domine ("Arise, O Lord"), outlining 41 purported errors found in Martin Luther's Ninety-five Theses and other writings related to or written by him. Luther was summoned by the emperor. Prince Frederick III, Elector of Saxony obtained an agreement that, if Luther appeared, he would be promised safe passage to and from the meeting. This guarantee was essential after the treatment of Jan Hus, who was tried and executed at the Council of Constance in 1415 despite a promise of safe conduct. Emperor Charles V commenced the Imperial Diet of Worms on 23 January 1521. Luther was summoned to renounce or reaffirm his views. When he appeared before the assembly on 16 April, Johann Eck, an assistant of the Archbishop of Trier, Richard von Greiffenklau zu Vollrads at that time, acted as spokesman for the emperor. The main events of the Diet of Worms relating to Luther took place from 16 to 18 April 1521. On 16 April, Luther arrived in Worms.
