The Learning Resource Center consisting of the Grade School, Junior High School, Senior High School and College Libraries, the Instructional Media Center, and the Archives Services. It formally opened its doors to high school students in 1957. After one year in operation, it started accepting grade school pupils. The grade school and high school students enrolled in the school were well entrenched
in the Dominican way of learning. During those days, the High School Library was located on the third floor of the old main building, which was named the St. Lorenzo Ruiz Building, while the Grade School Library was located in the second floor of the same building.
1980 brought about several expansions in buildings and services due to the growing population of the school. The establishment of the College Library came two years later and a qualified Librarian was hired along with an Assistant Librarian. The number of enrollees grew larger in 1985 and with this, the needs of the students. In response, the library added a reading room that the same year. The High School and the Grade School Library were transferred to the ground floor of the St. It occupied a space equivalent to two classrooms and was supervised by a Librarian and two Student Assistants. During the first quarter of that same school year, the College Library was re-arranged. The reading room was stacked with more books and a workroom for the Librarian was added. The following year, the Instructional Media Center was formally established. What was previously known as the Saint Catherine Academy was renamed Siena College Taytay in 1992, when the College Department started its operation.
1993 saw the start of the construction of the extension of the St. Dominic Building in Siena Heights Campus. During the construction, the libraries, together with the IMC were temporarily transferred to the second floor of the Mother Natividad Pilapil Hall. In May 1994, the extension was inaugurated and the IMC was transferred to its supposed to be permanent home in the basement of St. Dominic Building. The IMC was air-conditioned to protect its growing collections from humidity. Meanwhile, the High School and the College Libraries moved to a much bigger, air conditioned space in the rightwing of the second floor of the said building. In April 1995, a fire gutted the whole of St. Lorenzo Ruiz Building along with the Grade School Library adjacent to St. John the Baptist Parish Church. In June of the following year, the Grade School Library was accommodated by the High School and College Libraries in the new site. Eventually, the entire Grade School Department was transferred from St. John the Baptist Church campus to the Siena Heights Campus. In October 1994 the High School Department was granted a three-year accreditation by PAASCU. By February 1998, the High School Department has obtained the second-level of accreditation from the same accrediting agency. Meanwhile, the Grade School was granted a three-year accreditation, also by PAASCU in January 1997, and the second-level in December 2000. Currently, the High School is in Level 3 in PAASCU standards, while Grade School is in Level 2.
1996 was the year when IMC has to effect another transfer this time from the basement of St. Dominic to the 2nd floor of said building, right across the Grade School Library. The St. Thomas Aquinas building for the Service Education Department (College) was inaugurated in June 2005 and the College Library was again transferred from its previous location at the fourth floor of St.Dominic to the third floor of St. Thomas. The SED course offerings are BEED (Specialization on General Education/Major in Special Education), BSE (Major in English, Mathematics, General Science, Religion and Values Education and Guidance & Counseling), BSBA, BSN, BSHRM, BSIHM, BSTM, BSCS, BSCOE, BSECE, and BSIE. PAASCU has granted BSBA a Level 2 recognition while BSE/BEED and BSCS are preparing for a formal visit from PAASCU.
