The Nikola Tesla Museum, founded in 1952, preserves the personal items of Nikola Tesla, the inventor after whom the Tesla unit was named. It holds around 160,000 original documents and around 5,700 personal other items including his urn. The last of the major Belgrade museums is the Museum of Vuk and Dositej, which showcases the lives, work and legacy of Vuk Stefanović Karadžić and Dositej Obradović, the 19th century reformer of the Serbian literary language and the first Serbian Minister of Education, respectively. Belgrade also houses the Museum of African Art, founded in 1977, which has a large collection of art from West Africa.