 The main "beis midrash" is located on the second floor of the building which also houses the Kollel Chazon Ish on its upper floors, close to the Ponevezh yeshiva.The "rosh yeshiva" is Rav Naftoli Elzas, born shortly after the Holocaust in the Dutch town of Borculo.He is a graduate of Ponevezh Yeshiva.