November 20, 1947 Mediator Dei On the Sacred Liturgy “Encyclical promulgated by Pope Pius XII on November 20, 1947 To the Venerable Brethren, the Patriarchs, Primates, Archbishops, Bishops and other Ordinaries in...” Pope Pius XII
Religiosorum Institutio Instruction on the Careful Selection And Training Of Candidates For The States Of Perfection And Sacred Orders