Orthodox Rabbi, and the founder and first Rebbe of Chabad
1745 CE
to 1812 CE
Shneur Zalman of Liadi (September 4, 1745 – December 15, 1812 O.S.), is an Orthodox Rabbi, and the founder and first Rebbe of Chabad, a branch of Hasidic Judaism, at this time based in Liadi, Imperial Russia.
He is the author of many works, and is best known for Shulchan Aruch HaRav, Tanya and his Siddur Torah Or compiled according to the Nusach Ari.
He is also known as the Baal HaTanya, "Master of the Tanya", and by a variety of other names including Shneur Zalman Baruchovitch, Baruchovitch being the Russian patronymic from his father Baruch, by the acronym RaZaSh, "Rabbi Za- Sh-", by the title Baal HaTanya ve-haShulchan Aruch, "Master of the Tanya and the Shulchan Aruch, as the Alter Rebbe ("Old Rebbe" in Yiddish), Admor HaZaken ("Old Rebbe" in Hebrew), Rabbeinu HaZokein, Rabbeinu HaGodol, "our great rabbi", the GRaZ, and Rav.