Wikipedia
Max-Reger-Institute
The Max-Reger-Institute (MRI) is a musicological research institute and archive in Karlsruhe, Germany, dedicated to the work of the composer Max Reger, a representative of German music around the turn of the 20th century. An associated foundation, the Elsa-Reger-Stiftung, is named after his wife, Elsa Reger, who founded the foundation and the institute. It has a substantial archive of manuscripts and documents related to Reger.