During the Protestant Reformation, the popular tracts and catechisms of Martin Luther, John Calvin and other Reformers were sold in areas controlled by Protestant monarchs, who determined the faith in their region (see: Cuius regio, eius religio).
Pada masa Reformasi Protestan, traktat dan katekismus populer dari Martin Luther, Yohanes Calvin dan Reformer lainnya dijual di wilayah-wilayah yang dikendalikan oleh penguasa Protestan, yang mengambil alih kepercayaan di wilayah mereka (lihat: Cuius regio, eius religio).