Online version of the Catholic Encyclopedia - authoritative source on the teachings, traditions, and history of the Catholic Church.
Articles dealing with Islam and the modern world and the events of September 11.
The original Jewish Encyclopedia published from 1901-06 with 15,000 articles and illustrations.
Online encyclopedia of Judaism making accessible, from an orthodox perspective, a wide variety of information.
Searchable, browsable site providing profiles of individual religions.
The Vatican's official site with links to liturgical celebrations, the Catechism of the Catholic Church, and documents of Vatican Council II.