Rabbi DovBer, known as "The Maggid of Mezeritch", was the disciple of, and successor to, the founder of Chassidism, Rabbi Israel Baal Shem Tov. Rabbi DovBer led the Chassidic movement from 1761 until his passing on Kislev 19, 1772.

Links:
The Maggid's Passing
About Rabbi DovBer of Mezeritch

On the 19th of Kislev of the year 5559 from creation (1798), Rabbi Schneur Zalman of Liadi -- a leading disciple of Rabbi DovBer of Mezeritch (see previous entry) and the founder of Chabad Chassidism -- was released from his imprisonment in the Peter-Paul fortress in Petersburg, where he was held for 53 days on charges that his teachings threatened the imperial authority of the Czar. More than a personal liberation, this was a watershed event in the history of Chassidism heralding a new era in the revelation of the "inner soul" of Torah, and is celebrated to this day as "The Rosh Hashanah of Chassidism."

Links: About Kislev 19

On the very day that Rabbi Schneur Zalman of Liadi was liberated from prison (see above), a granddaughter was born to him -- the daugher of his son Rabbi Dovber and his wife Rebbetzin Sheina. The girl was named Menuchah Rachel -- "Menuchah", meaning "tranquility" (Rachel was the name of a daughter of Rabbi Schneur Zalman who died in her youth).

In 1845, Rebbetzin Menuchah Rachel realized her lifelong desire to live in the Holy Land when she and her husband, Rabbi Yaakov Culi Slonim (d. 1857), led a contingent of Chassidim who settled in Hebron. Famed for her wisdom, piety and erudition, she served as the matriarch of the Chassidic community in Hebron until her passing in her 90th year in 1888.

Chassidim joyfully celebrate today and tomorrow as the Rosh Hashanah ("new year") of Chassidism (see "Today in Jewish History"), with farbrengens (Chassidic gatherings) and an increased commitment to the ways and teachings of Chassidism. Tachnun (supplication) and similar prayers are omitted. We begin anew the yearly cycle of the daily study of the Tanya, Rabbi Schneur Zalman's major Chassidic work (as part of the "Chitas" daily study program.)

Links: The Longer Shorter Way; Today's Tanya Lesson