Papal Encyclicals Online:
This attractive and comprehensive site contains nearly every encyclical
written since the 1100s. It also contains a number of other documents,
is well-organized, and easy to use.
Fides
et Ratio
John Paul II's 1998 Encyclical on the relationship between Faith and Reason,
a subject that has often been the focus of the Holy Father, who is both
a theologian and philosopher. A key papal document.
Medieval Sourcebook
Very detailed and thorough listing of Early Church documents, Council
documents and other important texts.
The 1908 Catholic Encyclopedia
The entire text of this excellent reference work is online due to the
efforts of the Knights of Columbus. The Catholic Encyclopedia features
hundreds of essays on nearly every topic relating to the Catholic Faith.
10 Great Works of Catholic Theology and Philosophy