Friedrich Windischmann, a Roman Catholic theologian, was noted as one of the best authorities on Armenian linguistics in Germany during the first half of the nineteenth century. He was very well-versed in the Armenian and Old Persian languages, and in the various Sanskrit dialects. Besides many articles, he published the books Explanation of the Letter to the Galatians (1843), Mithra: A Contribution to the Religious History of the Orient (1857), and the posthumous Zoroastrian Studies (1863).