The Jewish Historical Society of England promotes the study of Ango-Jewish history. It holds monthly meetings and publishes annual transactions known as Jewish Historical Studies. The Society is based in London.

The British Association for Jewish Studies works to promote the teaching and research of Jewish culture throughout higher education in the United Kingdom. Dr Hannah Holtschneider is president and conference 2017 organizer.

The Byzantine Catholic Church in America is a website on the Byzantine Church. It offers resources on prayers, beliefs, clergy members and current Christian news. Contact through the website.

Antiochian Catholic Church in America is an online resource for Orthodox Christians. The website provides the history and beliefs of the Church and multiple liturgies. 

Uto Meier is a professor of religious education at Katholische Universitat Eichstätt-Ingolstadt in Germany. His research focuses on Catholic religious education.

Catholic Online  has over 5 million pages of resources including the largest online historical and biblical database about the Catholic Church.

Judaism and Jewish Resources is Andrew Tannenbaum’s site for Shamash.org. The site compiles many Jewish resource organizations on one webpage.

Philippe Chenaux is a professor of church history and theology at Pontificia Universita Lateranense in Rome. His research interests include the history of the papacy, the history of the Vatican and the history of modern Catholic thought.