Zecharias Frankel, also known as Zacharias Frankel (30 September 1801 – 13 February 1875) was a Bohemian-German rabbi and a historian who studied the historical development of Judaism. He was born in Prague and died in Breslau. He was the founder and, the most eminent member of, the school of historical Judaism, which advocates freedom of research, while upholding the authority of traditional Jewish belief and practice. This school of thought was the intellectual progenitor of Conservative Judaism.