The Nietzsche-Haus possesses a library open to researchers that contains one of the world's largest multi-language collections of books on the philosopher. "The Library of the Nietzsche Haus", Accessed 3 September 2011. The library also contains three collections of books that were donated to the library: Oscar Levy's collection (Nietzsche's first translator in English); Hans Erich Lampl's collection (a Nietzsche scholar); and Albi Rosenthal's collection (an antiquarian bookseller).