Jacob Rader Marcus (March 5, 1896 –14 November 1995) was a scholar of Jewish history and a Reform rabbi. Biography Born in Connellsville, Pennsylvania, United States into a traditional Jewish family and raised in Homestead, Pennsylvania, Marcus became interested in Reform Judaism at the age of 15. At that time, he traveled to Hebrew Union College (HUC), in Cincinnati, Ohio, to begin his rabbinical training. After a two-year interim during World War I, when he served in the American military, Marcus returned to graduate studies in Cincinnati. After receiving rabbinical ordination in 1920, Marcus was appointed to the faculty of HUC, where he began teaching biblical history. In 1922, Marcus traveled to Berlin to study Jewish history with Ismar Elbogen, who awarded Marcus a Ph.D. in 1925. In that year, Marcus married Antoinette Brody in Paris. After briefly studying at Hebrew University in Jerusalem in 1926, Marcus returned to Cincinnati, where he lectured at HUC consistently until 1995. In 1959, he was named the Adolph S. Ochs Professor of American Jewish History. In 1965, he was appointed to HUC's Milton and Hattie Kutz Distinguished Service Chair in American Jewish History. Marcus devoted most of his post-World War II historical career to American Jewish history and founded the American Jewish Archives in Cincinnati in 1947 on the campus of HUC. He is, perhaps, best known for his work on Medieval European Jewish history, The Jew in the Medieval World: A Source Book: 315-1791, first published in 1938. In the 1970s, while director of the American Jewish Archives, Marcus publicly shared the account of Regina Jonas in response to the ordination of Rabbi Sally Priesand in 1972. Marcus informed The American Israelite in July 1973 that the only other known Jewish woman to receive ordination was Regina Jonas of Berlin but that she perished at the hands of the Nazi regime. Marcus also provided the title of Jonas' thesis, "Can a Woman Become a Rabbi?". Marcus died on the eve of November 14, 1995, at the age of 99. Marcus was the mentor of Jonathan Sarna. Works The Rise and Destiny of the German Jew. Cincinnati: Union of American Hebrew Congregations, 1934. The Jew in the Medieval World: A Source Book, 315-1791. Cincinnati: Union of American Hebrew Congregations, 1938. Communal Sick-Care in the German Ghetto. Cincinnati: The Hebrew Union College Press, 1947 Early American Jewry, Volume 1: The Jews of New York,