Rabbi Binyomin Beinush Finkel, (1911 - February 13, 1990), was the rosh yeshiva

Rosh yeshiva

Rosh yeshiva, , , is the title given to the dean of a Talmudical academy . It is made up of the Hebrew words rosh — meaning head, and yeshiva — a school of religious Jewish education...

 of Yeshivas Mir

Mir yeshiva (Jerusalem)

The Mir yeshiva , known as the Mirrer Yeshiva or The Mir, is an Orthodox Jewish yeshiva in Jerusalem, Israel. With 6,000 students, it is the largest yeshiva in Israel. Many of the students are from the United States and Canada. It is also believed to be the largest yeshiva in the world...

 in Jerusalem.

He was born in Mir, Belarus

Mir, Belarus

Mir is an urban settlement in Kareličy raion, Hrodna Voblast, Belarus on the banks of Miranka River, about 85 kilometers southwest of the national capital, Minsk....

, where his father Rabbi Eliezer Yehuda Finkel was the rosh yeshiva of the Mir yeshiva

Mir yeshiva (Poland)

The Mir yeshiva , commonly known as the Mirrer Yeshiva or The Mir, was a Haredi yeshiva located in the town of Mir, Russian Empire...

. Rabbi Finkel acquired most of his Torah

Torah

Torah- A scroll containing the first five books of the BibleThe Torah , is name given by Jews to the first five books of the bible—Genesis , Exodus , Leviticus , Numbers and Deuteronomy Torah- A scroll containing the first five books of the BibleThe Torah , is name given by Jews to the first five...

 knowledge during his studies at the yeshiva

Yeshiva

Yeshiva is a Jewish educational institution that focuses on the study of traditional religious texts, primarily the Talmud and Torah study. Study is usually done through daily shiurim and in study pairs called chavrutas...

. In 1931, he studied under the Chofetz Chaim

Yisrael Meir Kagan

Yisrael Meir Poupko , known popularly as The Chofetz Chaim, was an influential Eastern European rabbi, Halakhist, posek, and ethicist whose works continue to be widely influential in Jewish life...

, and in 1933-34 under Rav Yitzchok Zev Soloveitchik, the Brisk

Brest, Belarus

Brest , formerly also Brest-on-the-Bug and Brest-Litovsk , is a city in Belarus at the border with Poland opposite the city of Terespol, where the Bug River and Mukhavets rivers meet...

er Rov.

After his arrival in Palestine

Land of Israel

The Land of Israel is the Biblical name for the territory roughly corresponding to the area encompassed by the Southern Levant, also known as Canaan and Palestine, Promised Land and Holy Land. The belief that the area is a God-given homeland of the Jewish people is based on the narrative of the...

, he became close to the Chazon Ish. He married the daughter of Rav Shmuel Greineman, the Chazon Ish's brother-in-law. He began giving lectures in Yeshivas Mir, and in 1965 he began to head the yeshiva.

His son-in-law Rabbi Nosson Tzvi Finkel

Nosson Tzvi Finkel (Mir)

Nosson Tzvi Finkel was an American-born Haredi Litvish rabbi and rosh yeshiva of the Mir Yeshiva in Jerusalem, Israel. During his tenure from 1990 until his death in 2011, he built the Mir into the largest yeshiva in Israel with nearly 6,000 undergraduate students and over 1,600 avreichim...

, (who is also his first cousin's son), is the previous rosh yeshiva of Yeshivas Mir in Jerusalem. Three other sons-in-law act as associate Roshei Yeshiva, they are Rabbis Binyomin Carlebach, Nachman Levovitz, and Yisroel Glustein.
Another of his sons-in law, Rabbi Ahron Lopiansky, is rosh yeshiva of Yeshiva of Greater Washington, in Silver Spring.