Hassidism emerged as a pietistic devotional movement in eastern Europe, built around rabbis that were seen as embodying the teachings they offered and assigned attributes as healers, wonder workers, and bearers of supernatural powers (termed "rebbes" or "tzadiks"). The charismatic Hassidic leaders challenged traditional rabbinic authority but became a major force across eastern Europe-Lithuania, Poland, Ukraine, and Russia. Largely wiped out by the Holocaust, groups moved to Western Europe, the US and Israel and a few like the Satmar and Lubavicther (currently the largest Hassidic group) have thrived.