Cheontae is the Korean descendant of the Chinese Buddhist school Tiantai. Tiantai was introduced to Korea a couple of times during earlier periods, but was not firmly established until the time of Uicheon (1055-1101) who established Cheontae in Goryeo as an independent school.
Due to Uicheon's influence, it came to be a major force in the world of Goryeo Buddhism. After he returned from Song China in 1086, Uicheon sought to ease conflict between the doctrinal Gyo (教) schools and Seon (禪) schools, believing that the Cheontae doctrine would be effective to this end. Cheontae doctrine holds the Lotus Sutra as the peak of the Buddha's teachings, and postulates the following:
- All things are empty and without essential reality.
- All things have a provisional reality.
- All things are both absolutely unreal and provisionally real at once.
In accordance with the Cheontae doctrine, all experiences in the sensory world are in fact expressions of Buddhist law (Dharma), and therefore contain the key to enlightenment. This explains the extravagant altars and the colorful details found at Cheontae temples, differing from the austere aesthetic of the Seon (Zen) school.
Cheontae as a school has been largely absorbed into the Jogye Seon tradition, but an independent Cheontae school continues to exist with an estimated 2 million adherents.  The school's headquarters are at Guinsa in Chungcheongbuk-do, near Danyang.
- Cheontae (in Korean)
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