Ad Diem Illum Laetissimum
Jubilee of the Immaculate Conception. Outlines the great riches and the wonderful hidden implications behind the dogma of the Immaculate Conception.

E Supremi Apostolatus
The Restoration of All Things in Christ. First encyclical of Pope Pius X; outlines the program of his pontificate.

Letter to the French Hierarchy in 1910
On the Sillon and Democracy.

Pascendi and Lamentabili
On Modernism. The famous refutation of the saintly Pontiff, Pius X issued in 1907 against the doctrines of Modernism, that synthesis of all errors. Cuts through foggy Modernist thinking, evolution of dogma, etc. Includes a syllabus of condemned Modernist teachings.

Casti Connubii
On Christian Marriage. The basic unit of society, the family, has been torn asunder. The Pope outlines the rights and duties of the sacred bond, the need to prepare for it well, the evils of divorce, etc.

Divini Redemptoris
On Atheistic Communism. Pius XI here outlines the theories and practices of communism and its evil effects upon society, contrasting with it the Catholic ideal. He pleads urgently to both individuals and states to oppose this enemy of civilization in every possible way.

Ingraviscentibus Malis
On the Recitation of the Rosary. In our battle against modern social and spiritual evils, the Rosary is one of our most powerful weapons. Its power is cited by examples in history to prove the efficacy of this prayer to combat world evils.

Mit Brennender Sorge
The Church in Germany. The Pope defends the Church’s position in war-torn Germany and endeavors to strengthen the faith and courage of Catholics undergoing the growing persecution of the Nazi regime.

Mortalium Animos
On Fostering True Religious Unity. Never before have men so ardently longed for peace among nations, but where is true unity to be found? Will it be found without God, His Church, the Truth? Why has the Church never allowed her children to take part in the assemblies of non-Catholics?

Quas Primas
On the Kingship of Christ. The Holy Father relates his reasons for closing the Holy Year 1925 with the institution of the Feast of Christ the King — as a remedy to the plague of secularism destroying the faith and stability of society.

Rite Expiatis
On St. Francis of Assisi. Issued to commemorate the seventh centenary of the death of St. Francis. Spotlights his virtues — his humility, charity, poverty, obedience — as a remedy for the evils of our times.