Shneur Zalman of Liadi (or Reb Schneur Zalman or Baal HaTanya or Alter w:Rebbe ("Old Rebbe" in Yiddish) or The Rav) (September 4, 1745 – December 15, 1812) was an Orthodox rabbi and the founder and first Rebbe of w:Chabad Lubavitch, a branch of Hasidic Judaism.