Durham has unique research resources in particular areas:
- medieval British history
- early modern English history
- the history of north-eastern Africa, especially Sudan
- modern British history.
The University Library, with its Archives and Special Collections, and the Durham Cathedral Library and Archives also have historical resources of international significance. These include the medieval to modern archives of Durham Cathedral and the Durham Palatinate, medieval and early-modern book collections, modern manuscripts, the Sudan Archive, and extensive microfilm and online sources. Neighbouring record offices and libraries contain even further rich historical collections.