Shulchan Aruch HaRav

The Shulchan Aruch HaRav (Hebrew שולחן ערוך הרב: "Code of Jewish Law by the Rabbi"; also Shulkhan Arukh HaRav) is a codification of halakha by Rabbi Shneur Zalman of Liadi, known during his lifetime as HaRav ("The Rabbi"). Following his death, he has been alternately referred to as the Alter Rebbe (Yiddish: Old Rebbe) in Chabad Hasidic circles, the Gra"z, or the Gaon Ha'amiti (the true genius). He is also often referenced as both the "Tanya" as well as the "Baal HaTanya" (Author of the Tanya) more broadly, for his other main work.

Read more about Shulchan Aruch HaRav:  New Version of The Shulchan Aruch, Influence