Chùa Khai Nguyên, formerly known as Cổ Liêu Tự and often referred to as Chùa Cheo, is a historically significant Buddhist temple located in Sơn Đông, Sơn Tây, Hanoi. With a rich history dating back to the mid-16th century, it has been meticulously restored over the years by dedicated community members and practitioners. The temple boasts ancient artifacts, including stone steles from 1759 and 1816, as well as a bronze bell cast in 1870, illustrating its profound spiritual heritage.

Operating under the Tịnh Tông Học Hội Việt Nam, Chùa Khai Nguyên offers a sanctuary for learning and practicing Buddhist teachings. Visitors can participate in meditation sessions, Dharma talks, and a variety of community events aimed at fostering spiritual growth. The temple also serves as a resource center, providing access to Buddhist texts and audio-visual materials. With its serene atmosphere and supportive community, Chùa Khai Nguyên remains a vital part of both local and national spiritual life in Vietnam.