Tengrism: Original Religion of the Turks and Mongols

In which God did the Turks actually believe before they accepted Islam? This is a question that I have often been asked by relatives, friends and you, the YouTube community. In the Turkic Book of Divination, which was written in the 9th century in East Asia, a certain name drops many times throughout the text: Tengri. This being is there described as the God of the Turks. It is him who the Turks – and other steppe peoples like the Mongols and Huns – prayed to before converting to other religions.