Revolving Archive is located to the east of the Tower of Buddhist Incense. This group of buildings consists of the main building, side pavilions and a large stone tablet bearing the inscription "Longevity Hill, Kunming Lake", about 10 meters high, in Emperor Qianlong's handwriting.

Architecture
In each side pavilion, there is an octagonal wooden tower on which the Buddhist scriptures were placed. The tower revolved about a central axis controlled by a mechanism below.

Announcing the function
This group of buildings was where the emperors and empresses kept copies of Confucian classics, Buddhist scriptures and Buddha portraits, and it was also the place where they chanted scriptures and prayed. When emperors and empresses came to chant scriptures and pray, they just turned the tower, turning the switch once symbolizing chanting scriptures once. Hence the name "Revolving Archive."

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