The Nietzsche Archive (German: Nietzsche-Archiv) is the first organization that dedicated itself to archive and document the life and work of the philosopher Friedrich Nietzsche, all sourced from Elisabeth Förster-Nietzsche, the philosopher's sister. Since German reunification, the archive's holdings are in possession of the Stiftung Weimarer Klassik, now called the Klassik Stiftung Weimar. The archive's domicile, the Villa Silberblick, is now a museum.