German rabbi and historian; born March 14, 1844, at Ladány, near Tokaj, Hungary. The descendant of an ancient family of scholars, he pursued his rabbinical studies at the yeshibot of Ujhely, Verbé, and Eisenstadt (the last-named then in charge of Israel Hildesheimer). He studied (1868-71) philosophy and Orientalia at the universities of Vienna, Budapest, and Berlin, taking his Ph.D. degree at Tübingen. In Dec., 1871, he was called as rabbi to Lauenburg in Pomerania; in 1874, to Gnesen, Prussian Posen; and in Sept., 1878, to Frankfort-on-the-Main. At Frankfort he organized two model religious schools. Horovitz is one of the directors of the Deutsche Rabbinerverband, and president of the German Jewish orphan asylum at Jerusalem.
Besides numerous sermons; "Maṭṭeh Lewi," a work in Hebrew on letters of divorce (Frankfort-on-the-Main, 1891); and essays on the origin of the Hungarian Jews (in "Izraelita Közlöny," 1869) Horovitz has published the following works: "Zur Gesch. der Jüdischen Gemeinde in Eisenstadt," 1869; "Jose ben Jose," in "Jüdische Presse," 1873; "Frankfurter Rabbinen," 4 parts, Frankfort-on-the-Main, 1882-85; "Jüdische Aerzte in Frankfurt-a.-M." 1886; "Die Wohlthätigkeitspflege bei den Juden im Alten Frankfurt," 1896; "Zur Statistik der Jüdischen Bevölkerung im Alten Frankfurt," 1896; "Die Frankfurter Rabbinerversammlung vom Jahre 1603," 1897; "Die Inschriften des Alten Friedhofes der Israelitischen Gemeinde zu Frankfurt-a.-M." 1901.