Between various Protestant elements and Charles V. Establishes the principle of 𝘤𝘶𝘪𝘶𝘴 𝘳𝘦𝘨𝘪𝘰, 𝘦𝘪𝘶𝘴 𝘳𝘦𝘭𝘪𝘨𝘪𝘰: "whose realm, his religion".