The Royal Library, belonging to the University of Copenhagen, is the largest library in the Nordic countries with an almost complete collection of all printed Danish books since 1482. Founded in 1648, the Royal Library is located at four sites in the city, the main one being on the Slotsholmen waterfront. Copenhagen's public library network has over 20 outlets, the largest being the Central Library (''Københavns Hovedbibliotek'') on Krystalgade in the inner city.