The idea of individual religious tolerance on a national level was, however, not addressed: neither the Reformed nor Radical churches (Calvinists and Anabaptists being the prime examples) were protected under the peace (and Anabaptists would reject the principle of cuius regio eius religio in any case).
John Sigismund, Elector of Brandenburg converted to Calvinism in 1613, but his subjects remained predominantly Lutheran.