Rabbi Isaac Elchanan Theological Seminary

Yitzchak Elchanan Spektor, namesake of the Seminary

The first Jewish schools in New York were El Hayyim and Rabbi Elnathan's, on the Lower East Side. In 1896,[2] several New York and Philadelphia rabbis agreed that a rabbinical seminary based on the traditional European yeshiva structure was needed to produce American rabbis[2] who were fully committed to what would come to be called Orthodox Judaism. There were only two rabbinical seminaries in the United States, Hebrew Union College, which followed Reform Judaism, and the Jewish Theological Seminary, which was first affiliated with the more established Orthodox community in America and later Conservative Judaism.[3] Bernard L. Levinthal and other leading Orthodox rabbis of the day founded the school,[2] calling it the Rabbinical College of America (not related to the current institution of that name). In 1915, it merged with an elementary school, the Eitz Chaim Yeshiva, and its name was changed to Rabbi Isaac Elchanan Theological Seminary (RIETS), named after Yitzchak Elchanan Spektor, a Russian rabbi who died the year of the school's founding. Bernard Revel was appointed as head of the combined school. In 1916 it expanded to include a high school, the Talmudical Academy. In the late 1920s, the institution began a building campaign of US$5 million, announcing an institution called the "Yeshiva of America",[4][5] later the "Yeshiva College of America",[6] before finally settling simply on Yeshiva College.[7] In 1926, it bought a three-block site in Washington Heights, built its first building,[8] and moved its operation there.[5][9] As of 2018, that building continued to house the Yeshiva University (YU) affiliated high school, but all other operations had moved to other buildings on the expanded campus surrounding it.

The high school, previously part of RIETS, became a separate entity, and RIETS became exclusively a college-level program, including granting of degrees via semikhah (rabbinical ordination). Secular studies were added, with the RIETS rosh yeshiva (dean) also serving as president of the college secular academic programs while Moshe Soloveichik served as co-head of RIETS. This arrangement continued into the 1940s. However, the second president, Samuel Belkin, legally separated the two institutions in order to obtain United States government funding and research grants for a variety of YU's secular departments due to the separation of church and state in the United States.

RIETS scholar Joseph B. Soloveitchik strongly opposed the split, but Belkin prevailed and, following the split, remained both the official rosh yeshiva of RIETS and president of YU. Despite the separation, the identities have continued to be blended Both the religious seminary and the college undergraduate Talmudic department are called RIETS, and have the same faculty and students.

With the 2003 appointment of Richard Joel, a layman, as president of YU, the dual role ended. Joel's predecessor, Norman Lamm, continued as the official rosh yeshiva of RIETS with Richard Joel being the Chief Executive and responsible for fundraising and administrative issues.

Menachem Penner became the dean of RIETS in 2013 after Yona Reiss resigned to take the position as head of the Chicago Rabbinical Council. Previously, Penner had been the assistant dean of RIETS.

At the time of Reiss's appointment, RIETS absorbed the academic administration of the Undergraduate Torah Studies programs affiliated with Yeshiva College and Sy Syms School of Business on the Wilf Campus (Mazer Yeshiva Program, Stone Beit Midrash Program, Isaac Breuer College, and the James Striar School).

The RIETS semikhah program is a structured four-year curriculum. The primary focus is on advanced Talmudic learning as well as developing a proficiency in deciding matters of classical and contemporary halakha (Jewish law; see Yeshiva § Jewish law). There are a variety of required ancillary courses, such as homiletics, pastoral counseling, and Jewish philosophy, that are intended to train students for careers as practicing rabbis. There is an honors track within the general semikhah program whereby students receive an extra stipend and are required to take additional courses.

The majority of students in the semikhah program are also enrolled in the Katz Kollel which is led by the rosh kollel, Hershel Schachter. Many RIETS students are also concurrently enrolled in a variety of other graduate degree-granting programs in law, education, academic Jewish studies, psychology, and the sciences. RIETS has two post-semikhah kollelim (referred to as the Kollel Elyon) which offer students the opportunity to study Torah at an advanced level and take supplemental courses for an additional 3 to 4 years while receiving a stipend. The roshei kollel of the Kollel Elyon are Michael Rosensweig and Mordechai Willig.

Members of the Brisker dynasty, Moshe Soloveichik and Joseph B. Soloveitchik were heads of RIETS, and Ahron Soloveichik and Aharon Lichtenstein lectured there for significant portions of their careers. Shimon Shkop taught at RIETS for a short period in 1929, as did Shlomo Polachek, Menachem Mendel Zaks, Moshe Shatzkes, Nisson Alpert, Dovid Lifshitz and Moshe David Tendler.[10]

Later roshei yeshiva include: Hershel Schachter, Eliyahu Ben Haim, Mordechai Willig, Michael Rosensweig, Mayer Twersky, Jeremy Wieder, Yaakov Neuburger, Baruch Simon, Zvi Sobolofsky, David Hirsch, J. David Bleich, and Daniel Stein, Hershel Reichman and Ezra Schwartz.

Ordination can technically be conferred upon a student who completes all of the necessary requirements for semikhah at any point in time. Nonetheless, every three or four years, RIETS conducts a formal Chag Hasemikhah—an official celebration of the students who received rabbinic ordination since the previous Chag. It is traditionally held on or about the yartzeit of Isaac Elchanan Spektor which is Adar 21.[11]

• Jacob Bosniak (1887–1963), rabbi of the Ocean Parkway Jewish Center in Brooklyn[12]
• Mordechai Gifter (1915–2001), rosh yeshiva of the Telz Yeshiva in Cleveland[13]
• Joseph Lookstein (1902–1979), rabbi and president of Bar-Ilan University[14]
• Avigdor Miller (1908–2001), right-wing rabbi and author[15]
• Emanuel Rackman (1910–2008), Modern Orthodox rabbi; President of Bar-Ilan University
• Yitzchok Scheiner (1922–2021), rosh yeshiva of the Kamenitz yeshiva of Jerusalem[16]
• Nosson Meir Wachtfogel (1910–1998), mashgiach ruchani (spiritual supervisor) of Beth Medrash Govoha

• Rabbi Isaac Elchanan Theological Seminary
• Yeshiva University High School for Boys (The Mesivta of Yeshivat Rabbeinu Yitzchak Elchanan)
• YU Torah Online