The hilula of our master and teacher, the holy Baal Eitz Chaim zy"a, at his grandson, our teacher HaGaon, Av Beis Din and Rosh Yeshiva shlit"a, in the Heichal of our Yeshiva Gedola, Shiur Daled, where the Rav also affixed a mezuzah on a new classroom in the yeshiva.