The Bibliotheca Mozartiana of the International Mozarteum Foundation owns a valuable historical collection that is gradually being made available online. This includes a large part of Mozart’s entire family correspondence (including 200 of Mozart’s letters), numerous music autographs as well as historical books, journals, music manuscripts and music prints.

Bibiotheca Mozartiana digital has extensive search options (including full text search for printed texts). In addition, the digital copies are assigned to various thematic collections, which provide an overview of the available sources (for example, letters and documents, music prints, librettos, etc.). It is also possible to subscribe to an RSS feed to automatically receive information about newly posted works.