The National Archives
The National Archives of England, Wales and the United Kingdom holds the records of central government and the courts of law. The records span an unbroken period from the 11th century to the present day.
The Library holds published works that complement the archives and facilitate access to the original records. Strengths include histories of UK government departments; histories of British foreign policy and policy making bodies, imperial and colonial histories, histories of individual countries and regions; the intelligence agencies, works on the armed forces, the history and working of the English law courts, social and economic history, directories and biographical materials; guides to genealogical and family history; topography and local history especially the English counties.