The professional estate of Prof. Hans Fischer (*1881 – †1945) spans from 1922 to 1945. It contains personal documents as well as materials from his teaching activities. Professor Hans Fischer held the Chair of Organic Chemistry at the Technical University of Munich from 1921 until his death in 1945. In 1930, he was awarded the Nobel Prize for his achievement in the complete synthesis of hemin. The extensive correspondence of Hans Fischer provides insight into a lesser-known collection from the period of National Socialism.