Elijah ben Solomon Zalman, also known as the Vilna Gaon Yiddish: דער װילנער גאון Der Vilner Goen; Polish: Gaon z Wilna, Gaon Wileński; or Elijah of Vilna, or by his Hebrew acronym Gr"a ("Gaon Rabbenu Eliyahu": "Our teacher Elijah the Genius"; Sialiec, April 23, 1720 – Vilnius October 9, 1797), was a Lithuanian Jewish Talmudist, halakhist, kabbalist, and the foremost leader of misnagdic (non-hasidic) Jewry of the past few centuries. From Wikipedia
