Joel Teitelbaum (Hebrew: יואל טייטלבוים‎, Ashkenazi pronunciation: IPA: [jɔjl̩ teɪtɛlbɔjm]; 13 January 1887 – 19 August 1979) was the founder and first Grand Rebbe of the Satmar dynasty. A major figure in the post-war renaissance of Hasidism, he espoused a strictly conservative and isolationist line, rejecting modernity. Teitelbaum was a fierce opponent of Zionism, which he decried as inherently heretical. His role as a Jewish community leader in Transylvania during the Holocaust remains controversial.