The most important library in Slovakia is the Slovak National Library (4.4 million volumes), founded in 1863 and located at Martin. The State Scientific Library in Banská Bstrica (1926) holds almost two million volumes, and the Comenius University in Bratislava has the country's largest university collection of 2.2 million volumes. In 1997, Slovakia had 2,630 public library service branches holding a total of 19.4 million volumes. Slovakia has more than 50 museums. The Slovak National Gallery (1948), the Slovak National Museum (1924), the Natural History Museum (1948), and the History Museum (1924), are all in Bratislava. The State Gallery of Art is in Banská Bstrica. There are dozens of regional museums throughout the country.