section_path: Demographics/Religion
section_name: Religion
paragraph_text: Religion
  
  Catholicism constituted the single official religion of the Empire until 1555; the Holy Roman Emperor was always Catholic.
  
  Lutheranism was officially recognized in the Peace of Augsburg of 1555, and Calvinism in the Peace of Westphalia of 1648. Those two constituted the only officially recognized Protestant denominations, while various other Protestant confessions such as Anabaptism, Arminianism, etc. coexisted illegally within the Empire. Anabaptism came in a variety of denominations, including Mennonites, Schwarzenau Brethren, Hutterites, the Amish, and multiple other groups.
  
  Following the Peace of Augsburg, the official religion of a territory was determined by the principle cuius regio, eius religio according to which a ruler's religion determined that of his subjects. The Peace of Westphalia abrogated that principle by stipulating that the official religion of a territory was to be what it had been on 1 January 1624, considered to have been a "normal year". Henceforth, the conversion of a ruler to another faith did not entail the conversion of his subjects.
  
  In addition, all Protestant subjects of a Catholic ruler and vice versa were guaranteed the rights that they had enjoyed on that date. While the adherents of a territory's official religion enjoyed the right of public worship, the others were allowed the right of private worship (in chapels without either spires or bells). In theory, no one was to be discriminated against or excluded from commerce, trade, craft or public burial on grounds of religion. For the first time, the permanent nature of the division between the Christian churches of the empire was more or less assumed.
  
  A Jewish minority existed in the Holy Roman Empire. The Holy Roman Emperors claimed the right of protection and taxation of all the Jews of the empire, but there were also large-scale massacres of Jews, especially at the time of the First Crusade and during the wars of religion in the 16th century.