The Goussen library collection is a specialist library for oriental church history. It contains prints in Western classical and modern languages, but predominantly prints in oriental languages such as Syrian, Coptic, Ethiopian, Arabic, Armenian and Georgian languages from the 16th to the 20th century (the focus is on the 18th and the 19th century). The former owner Heinrich Goussen (1863 – 1927) collected nearly every print within the language groups that had ever been published about the subject. The collection contains numerous rare or valuable oriental prints. There could hardly a collection be put together as completely as here, not even from the holdings of large European libraries.