Belz is a Hasidic dynasty founded in the town of Belz in Western Ukraine, near the Polish border, historically the Crown of the Kingdom of Poland. The חסידות  was founded in the early 19th century by Rabbi Shalom Rokeach, also known as the Sar Shalom, and led by his son, Rabbi Yissachar Dov, and grandson, Rabbi Aharon, before the Nazi invasion of Poland in 1939. While Rabbi Aharon managed to escape Europe, most of the Belz Hasidim were killed. Rabbi Aharon re-established the Hasidut in Tel Aviv, Israel. Today Belz is one of the largest Chasidic movement in Israel, and has sizable communities in England, Brooklyn, New York, and Canada.