The archives of the Diocese of Leeds include some of the most important collections of documents relating to the history of the Catholic Church in the North of England since the late eighteenth century.
These collections comprise:
The papers of the Vicars Apostolic of the Northern District (prior to 1840)
The papers of the Vicars Apostolic of the Yorkshire District (1840-50)
The records of the Diocese of Beverley (1850-78)
The records of the Diocese of Leeds (from 1878 to the present day).