The Mir Yeshiva (, Yeshivas Mir), commonly known as the Mirrer Yeshiva () or The Mir, was a Lithuanian yeshiva located in the town of Mir, Russian Empire (now Belarus). After relocating a number of times during World War II, it has evolved into three yeshivas, one in Jerusalem, with a subsidiary campus in Brachfeld, Modi'in Illit, and the other two in Brooklyn, New York: the Mir Yeshiva, and Bais Hatalmud. Origins The Mirrer Yeshiva was founded in 1815, 12 years after the founding of the Volozhin Yeshiva, by one of the prominent residents of a small town called Mir (then in Grodno Governorate, Russian Empire), Rabbi Shmuel Tiktinsky. After Rav Shmuel's death, his youngest son, Rabbi Chaim Leib Tiktinsky, was appointed rosh yeshiva. He was succeeded by his son, Rav Avrohom, who brought Rabbi Eliyahu Boruch Kamai into the yeshiva. During Rabbi Kamai's tenure the direction of the yeshiva wavered between those who wished to introduce the study of musar and those who were against it. In 1903, Rabbi Kamai's daughter Malka married Rabbi Eliezer Yehuda Finkel, son of the legendary Rabbi Nosson Tzvi Finkel, the Elder of Slabodka, who joined the yeshiva faculty in late 1906. Under his influence, the yeshiva joined the musar movement definitively and Rabbi Zalman Dolinsky of Radun was appointed as its first mashgiach. World War I With the outbreak of World War I in 1914, the yeshiva moved from Mir to Poltava (now in Ukraine). Following the death of Rabbi Kamai in 1917, Rav Eliezer Yehuda was appointed as rosh yeshiva, ushering in the golden age of the yeshiva. In 1921, The yeshiva moved back to its original facilities in Mir, where it blossomed, attracting the cream of the yeshiva students. The yeshiva's reputation grew, attracting students not only from throughout Europe, but also from America, South Africa and Australia, and the student body grew to close to 500. By the time World War II broke out there was hardly a rosh yeshiva of the Lithuanian school who had not studied in Mir. During this period Rabbi Yeruchom Levovitz joined the yeshiva as mashgiach in succession to Rabbi Zalman Dolinski. In 1929, one of the yeshiva's most gifted students, Chaim Leib Shmuelevitz ("Chaim Stutchiner"), married the daughter of Rabbi Eliezer Yehuda Finkel. Rabbi Chaim was appointed to the faculty in 1935. Escape to the East The invasion of Poland in 1939 by Nazi