Prof. Dr. Aron Freimann (1871-1948) was one of the outstanding personalities in the field of Jewish Studies at the beginning of the 20th century. He made the Hebrew and Jewish collections of Frankfurt University Library into one of the most significant holdings of its kind anywhere in Europe and also performed important functions in Frankfurt's Jewish community. The study relates the development of Jewish Studies to the context of Jewish cultural and literary history and represents an important contribution to the history of Jews in Germany prior to the advent of National Socialism.