Nadvorna is a Hasidic rabbinical dynasty within ultra-Orthodox Judaism. The dynasty derives its name from the town of Nadvorna, known in Ukrainian as Nadvirna. The town was located in the province of East Galicia (near the Carpathian Mountains) in the Austro-Hungarian Empire, until World War I; and between the two world wars, the town was located in eastern Poland (today, it is in Ukraine). The most famous rebbe of the dynasty was Rabbi Mordechai Leifer of Nadvorna (the son of Rabbi Yissachar Dov Ber (Bertche) Leifer of Nadvorna), whose writings form the corpus of the group's Hasidic thought. He was raised by his great-uncle, Rebbe Meir, the Second, of Premishlan. He lived a life of poverty and simplicity, as he would donate all the money that came his way to the needy. He was well known as a godly man, and a Baal Ruach HaKodesh. Hasidim from all over Hungary and Romania would come to receive his blessings and his advice. His teachings are collected in G'dulas Mordechai, Tif'eres Mordechai, Aspaklarya Hame'ira, Ma'amar Mordechai, and Oros Mordechai. Rabbi Yissachar Dov Ber (Bertche) Leifer of Nadvorna was a son of Rabbi Yitzchak of Kalish (a brother of Rabbi Meir of Premishlan), a son of Rabbi Aharon Leib of Premishlan, a son of Rabbi Meir Hagadol of Premishlan, a disciple and friend of the Baal Shem Tov. The Nadvorna dynasty is notable inasmuch as many of its descendants become rebbes (even during the lifetime of their father). It has perhaps the largest numbers of rebbes of any Hasidic dynasty. Since many of the rebbes of the Nadvorna Dynasty (as in other rabbinic dynasties) married relatives, many of the rebbes in this list are sons-in-law of other rebbes on the list. There are Nadvorna congregations in Jerusalem, Bnei Brak, Haifa, Hadera, Tzfat, Boro Park, Williamsburg, London, and Bloomingburg, among others. The rebbes of the Nadvorna dynasty have several unique customs, such as playing a violin on special occasions, for instance in front of the menorah on the festival of Hanukkah. The mode of dress of Nadvorna rebbes is unique in that they typically wear a white gartel over a colorful bekishe, and a white crocheted Jerusalem-style kippah under their shtreimel. Grand rabbis are known as "Admorim" (Hebrew אדמו"ר, which is the acronym for "אדונינו מורינו ורבינו", "Adoneinu Moreinu V'Rabeinu", "Our master, our teacher, and our Rabbi"). Outline of the History of the Nadvorna