The article acquaints the reader with the eminent catholic Austrian biblical scholar and orientalist Johann Jahn (1750–1816). Born in Moravia, he taught the Old Testament and oriental languages in Vienna. His brilliance was recognized throughout Europe by both Catholic and Protestant scholars. He faced various problems due to opposition from certain scholars in Hungary and also because of the new educational reforms imposed by the Emperors Joseph II, and Franz I of Austria. He influenced various generations of students of biblical theology in the Austrian empire.