National Archives (Hotel de Soubise)

The Archives nationales are the national archives of France. They preserve the archives of the French state, apart from the archives of the Ministry of Armed Forces and Ministry of Foreign Affairs, as these two ministries have their own archive services, the Defence Historical Service and Diplomatic Archives respectively. The National Archives of France also keep the archives of local secular and religious institutions from the Paris Region seized at the time of the French Revolution, as well as the archives produced by the notaries of Paris during five centuries, and many private archives donated or placed in the custody of the National Archives by prominent aristocratic families, industrialists, and historical figures.

The National Archives have one of the largest and oldest archival collections in the world.

Source: Wikipedia