The National Library of Finland is the oldest and largest scholarly library in Finland, with a collection of over 3 million volumes. It serves as a central national repository for printed material and publications produced in Finland and holds significant collections of international and foreign-language publications related to Finland and Finnish culture.

The library was established in 1640 and originally located in Turku, but was relocated to Helsinki in 1828. Its current building, designed by architect C. L. Engel, was completed in 1845 and is considered a masterpiece of neoclassical architecture. The library's collections include manuscripts, rare books, maps, newspapers, periodicals, music scores, and other forms of print and digital media.

The library's most famous holdings include the oldest known Finnish manuscript, the Birch Bark Letter, which dates back to the 13th century, and the Mirkka manuscript, a rare 16th-century illuminated manuscript of the Finnish national epic, Kalevala. The library also holds a significant collection of archives and personal papers of Finnish writers, artists, and scientists, as well as materials related to Finnish and Nordic literature and culture.

In addition to providing access to its collections, the National Library of Finland also offers a range of research and support services to scholars, students, and the general public, including exhibitions, lectures, workshops, and digitization services. It is also a member of the European Union's digitization initiative, Europeana, which provides online access to millions of cultural and historical artifacts from across Europe.