Rabbi Isaac Elchanan Theological Seminary (RIETS /riːts/) is the rabbinical seminary of Yeshiva University (YU). It is located along Amsterdam Avenue in the Washington Heights neighborhood of Manhattan, New York City. Named after Yitzchak Elchanan Spektor, the school's Hebrew name is Yeshivas Rabbeinu Yitzchok Elchonon (Hebrew: ישיבת רבינו יצחק אלחנן). The name in Hebrew characters appears on the seals of all YU affiliates.