Official Church Documents

Official Vatican Website
The official Vatican site, beautifully designed and with a variety of worthwhile features and links, including current news from Vatican and a vast collection of official documents of the Church.
Catechism of the Catholic Church
The entire Catechism online, with a search engine for looking up particular words and topics.
Catechism of the Ukrainian Catholic Church
The Catechism of the Ukrainian Catholic Church (pdf format).
The Baltimore Catechism
The well-known Catechism of the late 1800s.
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.
Catholic Information Center on Internet
This site contains a large number of links.
Eternal Word Television Network
This attractive site offers everything from spiritual reflections to news to a comprehensive library of Catholic documents.
Medieval Sourcebook
Very detailed and thorough listing of Early Church documents, Council documents and other important texts.