The Catholic Society

Veritatis Splendor (The Splendor of Truth) Pope John Paul II, August 6, 1993 (PDF)
Evangelli Gaudium (Proclamation of the Gospel) Pope Francis, Nov. 24, 2013 (PDF)
Lumen Fidei (The Light of Faith) Pope Francis, June 29, 2013 (PDF)
Humani Generis Redemptionem (On Preaching the Word of God) Pope Benedict XV, June 15, 1917 (PDF)
Paenitentiam Agrere (On the Need for the Practice of Interior and Exterior Penance) Pope John XXIII, July 1, 1962 (PDF)
Mediator Dei (On the Sacred Liturgy) Pope Pius XII, November 20, 1947 (PDF)
E Supremi (On Restoration of All Things in Christ) Pope Pius X Oct. 4, 1903 (PDF)
Evangelium Vitae (The Gospel of Life) Pope John Paul II, March 25, 1995 (PDF)
Libertas (On the Nature of Human Liberty) Pope Leo XIII, June 20, 1888 (PDF)
Miserentissimus Redemptor (On Reparation to the Sacred Heart) Pope Pius X, Oct. 4, 1903 (PDF)
Sacra Virginitas (On Consecrated Virginity) Pope Pius XII, March 25, 1954 (PDF)
Mystici Corporis Christi (On the Mystical Body of Christ) Pope Pius XII, June 29, 1943 (PDF)

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Articles

Resources

Catholic Productions Dr. Brant Pitre is an excellent teacher. He explains the Mass readings for every Sunday. You can purchase lectures from Dr. Pitre and many other excellent teaches, such as Dr. John Bergsma.
St. Paul Center Dr. Scott Hahn and many other excellent teachers have put together many resources for learning Christianity. Dr. Scott Hahn is a fantastic teacher of Christianity.
The Sacred Page Dr. John Bergsma has written excellent books and articles for learning the Christian faith. He is an excellent teacher.
Dr. Edward Sri Dr. Sri has written excellent books on understanding the Mass, Mary and Jesus' sacrifice on the cross. He is an excellent teacher.
Pauline Books and Media The Daughters of St. Paul have created many excellent resources to learn the Faith.
Ignatius Press Ignatius provides many excellent books and videos for learning about Christianity.
Tan Books Many excellent books for learning the Faith. The Catechism of the Council of Trent and many excellent books are available here.
Ascension Press Home of the Great Adventure Bible, which provides an excellent format for reading the Bible.
Aquinas 101 The Thomistic Institute has created a nice series of videos to learn the Christian religion.
Catholic Answers Catholic Answers has created many articles and a radio program for learning how to learn and defend Christianity.
Defenders of the Catholic Faith Steve Ray has written many articles for learning about and defending Christianity.