Tengri was the main god of the Turkic pantheon, controlling the celestial sphere. Tengri is considered to be similar to the Indo-European sky god,
*Dyeus, and the structure of the reconstructed
Proto-Indo-European religion is closer to that of the early Turks than to the religion of any people of Near Eastern or Mediterranean antiquity. In Christian Turkish usage
Tengri is used for the father of Jesus, who is referred to as "Tengri Oghli" (Son of God) and "Mshikha Tengri" (Messiah God). Tengri is also compared to Allah and Khuda. Apart from foreign religious influences, as far as known today, the original Turkish concept of Tengri was that of "heaven" or a spirit ruling in heaven. This spirit was probably imagined as some sort of force, corresponding to "mana" in modern ethnology. The most important contemporary testimony of Tengri worship is found in the
Old Turkic Orkhon inscriptions, dated to the early 8th century. Written in the so-called
Orkhon script, these inscriptions record an account of the mythological origins of the Turks. The inscription dedicated to
Kul Tigin includes the passages (in the translation provided by the Language Committee of Ministry of Culture and Information of the Republic of Kazakhstan): "When the blue sky [Tengri] above and the brown earth below were created, between them a human being was created. Over the human beings, my ancestors Bumin Kagan and Istemi Kagan ruled. They ruled people by Turkish laws, they led them and succeeded" (face 1, line 1); "Tengri creates death. Human beings have all been created in order to die" (), (face 2, line 9); "You passed away (lit.: 'went flying') until Tengri gives you life again" (face 2, line 14). Khagans ruled by the will of Tengri thought the ancient Turkic people and preserved these thoughts in the texts of the
Orkhon inscriptions in the following way: "I, Tengri-like and Tengri-born Turk
Bilge Kaghan, succeeded to the throne at this time" (). In one
Turkic myth, Tengri is a pure, white goose that flies constantly over an endless expanse of water, which represents time. Beneath this water, Ak Ana ("White Mother") calls out to him saying "Create". To overcome his loneliness, Tengri creates
Er Kishi, who is not as pure or as white as Tengri and together they set up the world.
Er Kishi becomes a demonic character and strives to mislead people and draw them into its darkness. Tengri assumes the name
Tengri Ülgen and withdraws into Heaven from which he tries to provide people with guidance through sacred animals that he sends among them. The
Ak Tengris occupy the fifth level of Heaven.
Shaman priests who want to reach
Tengri Ülgen never get further than this level, where they convey their wishes to the divine guides. Returns to earth or to the human level take place in a goose-shaped vessel. ==Geographical names==