and
Yehudah Aryeh Leib Alter in
Góra Kalwaria, Poland. In his early years, Yitzchak Meir Alter became a close disciple of
Simcha Bunim of Peshischa, who preached the ideals of
Talmudic rationalism and the pursuit of personal authenticity—later foundational tenets of Ger Hasidism. After Simcha Bunim died in 1827, Yitzchak Meir Alter was among his more radical supporters who followed
Menachem Mendel of Kotzk (the
Kotzker Rebbe) rather than Simcha Bunim's son,
Avraham Moshe. The Kotzker Rebbe continued in the ideological tradition of Peshischa, and after he died in 1859, most of his followers accepted Yitzchak Meir Alter as his successor rather than his son, Dovid. Yitzchak Meir Alter was living in
Warsaw at the time and operated a Kotzker
shtiebel (small congregation). Shortly after accepting the role of
Rebbe, Yitzchak Meir was appointed as the
Av Beit Din of
Góra Kalwaria (), where he established his own Hasidic court. After his death in 1866, his followers wanted his eighteen-year-old grandson,
Yehudah Aryeh Leib Alter, to succeed him. When Yehuda Aryeh Leib refused to accept this position, most of the Hasidim became followers of the elderly
Hasid Chanokh Heynekh HaKohen Levin, after whose death Yehudah Aryeh Leib acceded to the request of the Hasidim to become their next rebbe. The Gerrer movement flourished under the leadership of Yehudah Aryeh Leib and his eldest son and successor,
Avraham Mordechai Alter, known as the "Imrei Emes". In 1926, in a unusual move for Polish Hasidim, Avraham Mordechai established a
yeshiva in
Jerusalem, naming it for his father, the
Sfas Emes. The first
rosh yeshiva was Rabbi
Nechemiah Alter, a brother of the Imrei Emes. The yeshiva is the flagship of the Ger yeshivas. Under the leadership of the fifth Gerrer Rebbe,
Yisrael Alter, known as the "Beis Yisrael", the
Ichud Mosdos Gur (or Union of Gerrer Institutions) was established as the responsible body for funding all the educational institutions affiliated with Ger in Israel. There are about 100 such institutions. The Beis Yisrael helped rebuild the Ger movement after its virtual destruction in
World War II. in Europe == Distribution of Gerrer Hasidim ==