Grodno Yeshiva

Yeshiva Shaar HaTorah – Grodna, often referred to as the Grodna Yeshiva or simply as Grodna, was a Orthodox Jewish yeshiva in the Belarusian city of Grodno, then under Russian rule. Founded during World War I, Rabbi Shimon Shkop became "rosh yeshiva" in 1920.
History.
Early years.
The yeshiva was founded in either 1914 or 1916, formed with the enrollment of yeshiva students who were displaced from the ongoing World War I. Rabbi Refael Alter Shmuelevitz (father of Rabbi Chaim Shmuelevitz), was appointed as rosh yeshiva, and Rabbi Yosef Leib Nenedik was the yeshiva's first mashgiach ruchani.
Rabbi Shimon Shkop.
In 1920, at the urging of Rabbi Yosef Shlomo Kahaneman, as well as the encouragement of Rabbi Yisrael Meir Kagan (the Chofetz Chaim) and Rabbi Chaim Ozer Grodzenski, Rabbi Shimon Shkop became "rosh yeshiva". Rabbi Shlomo Harkavy became mashgiach around that time too; as part of his job, he was supposed to give students "mussar" (rebuke) when they did something wrong. However, as opposed to directly approaching a student and rebuking him for a specific act, he would simply talk about that type of wrongdoing with another person while in earshot of the student. A son-in-law of Rabbi Shkop, Rabbi Shraga Feivel Hindis, assisted his father-in-law in running the yeshiva.
The "hasmadah" (diligence in Torah study) in the yeshiva was well known, with the average student studying fifteen hours each day. The most diligent students were called the "Lions of Grodno" or in Yiddish, the "Ariyos fun Grodno"; they were capable of learning for eighteen hours a day. Among the "lions" were Moshe Zaretsky and Yisrael Zev Gustman, future "rosh yeshiva" in Ramailes. The two both used stay in the "beis medrash" (Torah study hall) for months, immersed in Torah learning. The yeshiva schedule was extremely rigorous with shacharis at seven o'clock in the morning and night "seder" (learning session) finishing at 1 AM. 
The yeshiva was divided into two schools: the "yeshiva ketana" for younger students and the "yeshiva gedolah" for older ones. Rabbi Chaim Shmuelevitz gave a "shiur" (class) in the "yeshiva ketana". The rosh yeshiva, Rabbi Shkop gave "shiur" for the "yeshiva gedolah". Rabbi Shkop's "shiur" would sometimes last over two hours long. 
Under his leadership, the yeshiva grew to over 200 students.
Disbandment and legacy.
At the Soviet Occupation of Poland in 1939, the yeshiva disbanded and fled to Vilnius. Rabbi Shkop however wasn't healthy enough for the journey, and remained in Grodno, where he passed away soon after.
The yeshiva was reestablished in Queens, New York and led by Rabbi Zelig Epstein, a grandson-in-law of Rabbi Shkop, under the same name, Yeshiva Shaar HaTorah. Rabbi Yosef Shlomo Kahaneman opened another reestablishment of the yeshiva in Ashdod, Israel, as a branch of his Ponovezh Yeshiva.