The Ruiguang Pagoda, originally known as Puji Buddha Hall, was built in 241 during the Wu State of the Three Kingdoms period (220-280). The pagoda is one of the most famous Buddhist temples in Suzhou. It is said that Ruiguang Pagoda, which means Auspicious Light Pagoda, often sends out a five-colored propitious light. Constructions at the temple have been long destroyed and only the pagoda is left standing. The structure has been listed as one of the three Panshan scenic spots lying in south Suzhou.

Ruiguang Pagoda is a pavilion-style construction of brick and wood. Octagonal in shape, the pagoda has seven stories and comprises the outer wall, corridor and middle section. It has a stone Sumeru base with carvings of beasts, flowers and clouds. There are doors on four sides on the first floor and on all eight sides on the second and third floors. Doors located on the fourth floor and beyond are not built along the same lines as the doors below. Its remnant is 42.44 meters high and the height of each floor decreases layer by layer resulting in a gradual reduction in diameter. The simple pagoda retains the architectural style of ancient pagodas of the Tang (618-907) and Song (960-1279) Dynasties.

In April 1978, a number of precious cultural relics from the Five Dynasties Period (907-960) and the Northern Song Dynasty (960-1127) were discovered on the third floor. The items included two gild bronze pagodas, nine statues of gods, hand-written Buddhist scriptures from the Five Dynasties period and wood-carved Buddhist scriptures from the Northern Song Dynasty. Among the uncovered relics, the jewelry dagoda, at 1.22 meters in height, was the most exquisite. The dagoda was assembled using jewels and by combining the techniques of jade carving, wood carving, gold painting and lacquering. The relics are considered very valuable to the study of the social life and art in the Song Dynasty.