National Library of Sweden

The National Library of Sweden (Swedish: Kungliga biblioteket, KB, meaning "the Royal Library") is the national library of Sweden, and was founded in 1661. It collects and preserves all domestic printed and audio-visual materials in Swedish, as well as content with Swedish association published abroad. Being a research library, it also has major collections of literature in other languages.

More information on the Wikipedia page. The English language version of the website is.