Such an act of toleration was unusual in Western Europe, where standard practice forced subjects to follow the religion of their ruler — the application of the principle of cuius regio, eius religio.
Tindakan toleransi sedemikian ini sangat tidak biasa di Eropa Barat, di mana kebiasaan yang lazim memaksa orang-orang untuk mengikuti agama penguasa mereka — penerapan prinsip cuius regio, eius religio.