Original: All parties would recognize the Peace of Augsburg of 1555 , in which each prince would have the right to determine the religion of his own state , the options being Catholicism , Lutheranism , and now Calvinism ( the principle of cuius regio , eius religio ) .
Simplified: All parties would now recognize the Peace of Augsburg of 1555 , by which each prince would have the right to determine the religion of his own state , the options being Catholicism , Lutheranism , and now Calvinism .