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Campus Facilities

RIS is located on a beautifully manicured 29-acre clean-air campus with separate buildings for elementary, middle school, and high school. The facilities at RIS allow our students and teachers the tools and resources they need to make the most of their learning, including a vibrant performing arts program and a comprehensive athletics program with over 60 sports teams.  As well as our purpose-built facilities highlighted below, our students enjoy art studios, choir and music rooms, two large multipurpose gyms, two full-sized covered gyms, squash courts, and PE classrooms. Students boarding at Seelos Residence enjoy private or shared college-style dorms and access to all the campus has to offer.

School Clinic

Our School Clinic offers on-campus healthcare services to the entire school community. The Clinic’s registered nurses assess medical needs as they arise and determine the best form of treatment, whether that be administering care in the Clinic or recommending that a child be sent home or to the hospital if more urgent care is required. The Clinic staff also maintains medical records, monitors students with medical conditions and allergies, and liaises with families to administer prescribed medications. RIS provides flu vaccinations each year, and nurses also screen regularly for colds, flu, and other contagious diseases. Clinic staff also provide first-aid care at sports events and school functions.


Our two libraries contain more than 100,000 print, electronic, and audiovisual materials. Along with this rich variety of materials, each library is supported by a knowledgeable, certified librarian and staff, and has been thoughtfully laid-out with spaces for quiet studying and reading.  

  • The Elizabeth Library (Elizabeth Library Catalog) caters to PreK–grade 5 students with books and resources on topics ranging from general interest to contemporary popular fiction. ES students are encouraged to search for engaging books at just the right reading level to support their literacy development.
  • The Griffith Library (Griffith Library Catalog) serves grade 6–12 students, with well over 50,000 books, 70 periodicals, and multiple online resources that span an enormous range of fiction, nonfiction, and reference materials.


Our extensive canteen offers an array of different food options from western to traditional Thai dishes. Students and faculty use their school ID cards to purchase their snacks and lunch each day, although students in PreK 3–grade 1 eat in a separate canteen and have a set menu. As well as providing a smaller, more familial environment for our younger students, this ensures that the children establish healthy eating habits. Students in grades 2–5 have the option to order the set lunch or buy food in the canteen. All sections have different lunchtimes to ensure safe, efficient and attentive service to our school community.

St. Thomas Café

One of two cafes on campus, the new Thomas Cafe is open 7:00–4:30, Monday to Friday and on Sunday from 9:30–12:30 for Thomas Church parishioners. The cafe is a hub for parents, students, faculty, and staff, with its contemporary decor and comfortable indoor and outdoor seating. It’s a welcoming space to grab a light lunch or to collaborate with a colleague while enjoying one of the many tasty coffees, teas, cold drinks, pastries, or ice creams.

St. Thomas Aquinas Church

This small chapel, or oratory, was named after the Patron Saint of Father Thomas Griffith, C.Ss.R., the founder of Ruamrudee International School. It was first opened to serve a small group of Catholics when the Redemptorist Fathers moved Ruamrudee International School to Minburi in 1992.

Later, the Redemptorist Fathers decided to build a larger church for the RIS Catholic community, and for Catholics who wished to come for Sunday Mass and Mother of Perpetual Help Services on Wednesday. The new St. Thomas Church was officially opened and blessed by Cardinal Meechai Kitbunchu in 2002. Fr. Chuchart Srivichairatana, C.Ss.R., was named as the first pastor of this church. (See below for further details on the history of the church.)

St. Thomas Aquinas Church serves the RIS community with Masses. An all-school Mass usually takes place on the first Thursday of each month. Father Meechai Udomdej, C.Ss.R., the Superior of Saint John Neumann Community in Minburi, is the current pastor.

For more information, please visit our Facebook page in English or in Thai.

Mass Schedules at St. Thomas Aquinas Church

Saturday: 7:00 pm (Thai) Sunday: 8:30 am (Thai), 10:00 am (English), and 11:15 am (Thai)

Mass Schedules at St. Mary Chapel (on campus)

Monday–Friday: 6:45 am (English)

1992 — The Redemptorist Fathers started building the new RIS campus in Minburi. Fr. Griffith was the director of the school.
1993 — On August 24, 1993, Fr. Griffith passed away. A few weeks later (September 1993), the new RIS campus was officially opened and blessed.
        — We opened a small RIS chapel on the 2nd floor of the Administration building and celebrated Masses for teachers and staff.  
        — Fr. Chuck was appointed as the Director of RIS.
        — Fr. Banchong was elected as the VP.
1994 — We had added another two Masses in Thai on Sundays to serve the growing number of Catholics living near the school.
         — About 150 people came to church every Sunday.
1995 — Fr. Banchong, the VP, asked permission to officially open a church for the school.
 1996 — Cardinal Meechai gave his official permission to open a church at RIS on April 23.
         — Fr. Travis was appointed as the first Rector of the Minburi Community and Director of RIS on March 5. 
1999 — Construction of the new school chapel began
2002 — The new chapel building was completed. Carinal Meechai approved and opened it under the name St. Thomas Aquinas Oratory, giving honor to Fr. Griffith as his patron saint.
        — The official blessing of St. Thomas Aquinas Oratory took place on January 5 by Cardinal Meechai Kitboonchu.
        — Fr. John Chanchart was appointed as the first pastor on July 1.
        — This Oratory was under the Bangkok Diocese.