Romisches Bullarium, Oder, Auszuge Der Merkwurdigsten Papstlichen Bullen: Aus Authentischen Quellen, Durch Alle Jahrhunderte Bis Auf Die Neueste Zeit, Volume 1

Apostolic letter Salvifici doloris of the Supreme Pontiff John Paul II to the bishops, to the priests, to the religious families and to the faithful of the Catholic Church on the Christian meaning of human suffering.

Faith and reason : encyclical letter Fides et ratio of the Supreme Pontiff John Paul II to the bishops of the Catholic Church on the relationship between faith and reason.

Dogmatic canons and decrees ; authorized translations of the dogmatic decrees of the Council of Trent, the Decree on the Immaculate Conception, the Syllabus of Pope Pius IX, and the decrees of the Vatican Council.

Les Registres de Nicolas III (1277-1280) - Primary Source Edition

Regulae Cancellariae Apostolicae: Die Papstlichen Kanzleiregeln Von Johannes XXII. Bis Nicolaus V.

The Summa Theologica of St. Thomas Aquinas; Volume 1

The Great Encyclical Letters of Pope Leo XIII

The "Summa Theologica" of St. Thomas Aquinas: 17

The "Summa Theologica" of St. Thomas Aquinas: 12