German Orientalist and librarian; born at Hürben, Bavaria, Feb. 22, 1846. He received his education at the yeshibah of Eisenstadt (Hungary), the gymnasium of Mayence, and the universities of Leipsic, Strasburg, and Munich (Ph.D. 1872). In 1875 he became privat-docent of Semitic languages at the University of Strasburg, and was appointed librarian there in 1884. In 1894 he received the title of "professor."
Landauer has written several essays on Semitic subjects, and has published: "Psychologie des Ibn Sinâ," 1872; "Sa'adja's Kitâb al-Amânât," Leyden, 1880; "Katalog der Kaiserlichen Universität- und Landesbibliothek Strasburg, Orientalische Handschriften," 1881; "Firdusi Schahname," Leyden, 1884; "Die Handschriften der Grossherzoglich Badischen Hof- und Landesbibliothek in Karlsruhe, Orientalische Handschriften," 1892; "Die Masorah zum Onkelos," Amsterdam, 1896; "Themistius 'De cælo'" (for the Aristoteles Commission of the Berlin Academy), Berlin, 1902.