An extensive collection of historical theological works from the private library of Prof. Ferenc Postma and Reverend Margaret Gosker. They donated this collection in 2012. The collection includes many rare and unique Protestant works from the 15th to 18th centuries. The library contains many titles from and about Hungary, including academic writings and works on Church history. Another focus is the so-called 'Franeker (academic) printing'. Those are hundreds (rehearsal) disputations and orations, usually held at the University of Franeker. In the 17th and 18th centuries, this university was an important theological training center, and hundreds of Hungarians came to study there.