Det Kongelige Bibliotek

The Royal Library has two very distinct parts: the original, 19th-century red-brick building and the breathtaking granite-and-glass extension, completed in 1999. The latter, nicknamed the Black Diamond, is the main draw. People come simply to marvel at the interior with its giant glass wall and views across the harbour, or to enjoy a bite in the cafe or the minimalist Søren K restaurant. You need to be a member to access what is the largest library in Scandinavia, containing 21 million books. Among them are original manuscripts and diaries by Kierkegaard and Hans Christian Andersen (including the fairy-tale writer’s unsuccessful application to work at the library). The Black Diamond also hosts popular exhibitions and concerts. Check the website for details. To the rear of the library is Det Kongelige Bibliotekshave (the Royal Library garden), a pretty, leafy oasis in the heart of the city.