Yisroel Hopstein

Yisroel Hopstein (1737–1814), also known as the Maggid of Kozhnitz, was the founder of Kozhnitz Hasidism, and a noted hasidic leader in Poland during the late 18th and early 19th century. He was a student of both the Magid/Dov Ber of Mezeritch and Elimelech of Lizhensk, and wrote many books on Chassidus and Kabbalah. He is sometimes referred to as "the Avodat Yisrael" for his works.