Cao Đài's left eye, similar to Eye of Providence.
The "Holy See" temple in Tây Ninh is the centre of the main Caodaist church.

Caodaism (Vietnamese: Đạo Cao Đài, Chữ nôm: 道高臺) is a monotheistic syncretic religion officially established in the city of Tây Ninh in southern Vietnam in 1926. The full name of the religion is Đại Đạo Tam Kỳ Phổ Độ (The Great Faith [for the] Third Universal Redemption).[1]

Adherents engage in practices such as prayer, veneration of ancestors, nonviolence, and vegetarianism with the goal of union with God and freedom from saṃsāra.[2] Estimates of the number of Caodaists in Vietnam vary; government figures estimate 4.4 million Caodaists affiliated to the Cao Đài Tây Ninh Holy See, with numbers rising up to 6 million if other branches are added.[3][4][5][6][7] However estimates vary. The United Nations found about 2.5 million Cao Dai followers in Vietnam as of January 2015.[8][9] An additional number of adherents in the tens of thousands, primarily ethnic Vietnamese, live in North America, Europe, and Australia.

Caodaist temple in Dallas, Texas, serving a large local Vietnamese community.