Zecharias Frankel, also known as Zacharias Frankel 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 positive-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.

Conservative Judaism is a Jewish religious movement that regards the authority of Jewish law and tradition as emanating primarily from the assent of the people through the generations, more than from divine revelation. It therefore views Jewish law, or Halakha, as both binding and subject to historical development. The conservative rabbinate employs modern historical-critical research, rather than only traditional methods and sources, and lends great weight to its constituency, when determining its stance on matters of practice. The movement considers its approach as the authentic and most appropriate continuation of Halakhic discourse, maintaining both fealty to received forms and flexibility in their interpretation. It also eschews strict theological definitions, lacking a consensus in matters of faith and allowing great pluralism.