The Huayan school of Buddhism (traditional Chinese: 華嚴; simplified Chinese: 华严; pinyin: Huáyán, Wade–Giles: Hua-Yen, "Flower Garland," from the Sanskrit "Avataṃsaka") is a Mahayana Buddhist tradition that developed in China during the Tang dynasty (618–907). The Huayan worldview is based primarily on the Buddhāvataṃsaka Sūtra (Chinese: 華嚴經; pinyin: Huáyán jīng, Flower Garland Sūtra) as well as on the works of Huayan patriarchs, like Zhiyan (602–668), Fazang (643–712), Chengguan (738–839), Zongmi (780–841) and Li Tongxuan (635–730).
Another name for this tradition is the Xianshou school (賢首, Xianshou being another name for patriarch Fazang). The Huayan School is known as Hwaeom in Korea, Kegon in Japan and Hoa Nghiêm in Vietnam.