Finnish society. The oldest document is from 1316 and the most recent ones from the 21st century. Customer service in Helsinki is centered at Rauhankatu. Hallituskatu The Hallituskatu location in Helsinki stores the archives of all ministries except the Ministry for Foreign Affairs, Ministry of Defence and the Prime Minister's Office. In addition, archives of committees, boards and task forces active in or after 1998 are stored there. Hallituskatu also has a reading room. Siltavuori The Siltavuori, Helsinki location houses less frequently used documents of the central government. It is the centre for digitization of the archives' material. The conservation and research for the technical preservation of documents is led from Siltavuori. The location has no customer service. The main building of the Sintavorri branch was originally as a granary of the Russian armed forces in 1885. From the beginning of independence until 1945, the building was a depot of the Finnish Defense Forces. In 1945, the building was given to the military archives. It was later assigned to the national archives in the late 1990s. Hämeenlinna The Hämeenlinna branch houses archives of local government offices and the church, private archives, some municipal archives and document reproductions stored on microfilm. The oldest documents are from the 17th century. Joensuu The Joensuu branch receives documents from government offices in Northern Karelia and Northern Savonia. It also stores church archives, documents from societies, companies and private individuals and a large microfilm collection. Jyväskylä The Jyväskylä branch stores documents from government officials, churches and individuals in the area. The oldest document is a letter written in Latin from 1535. As Jyväskylä is a city known for studies, the Jyväskylä branch also houses archives of schools and academies, including the microfilm collection of the Faculty of History of the University of Jyväskylä. Mikkeli The Mikkeli branch has documents from the regions of Southern Savonia, Southern Karelia and Kymenlaakso. It also stores documents and maps from officials and churches of the parts of Karjala ceded to the Soviet Union after the Winter War, which were originally stored at the Vyborg Regional Archives. The oldest document in Mikkeli dates back to 1455. Oulu The Oulu branch stores archives from local and regional governments. In addition, documents from about 2,500 societies, companies and private individuals form a notable part of the material stored in Oulu. The Oulu branch also houses the archives of Santa Claus, which has