The Tai Ayutthaya Empire (1351to 1767) and its successor after the Burmese invasion, the Bangkok Empire (1782 to 1932) were both of the Tai Siamese, who ruled an amalgam of ethnic groups (Mon, Tai, Khmer etc) the ancestors of whom today are what is now referred to as ’’ Thai ’’. The Kingdom of Ayutthaya was a Tai Kingdom formed at Ayutthaya in the Central region of Thailand. It expanded to conquer most of modern Thailand and some neighbors. In this section we deal with how it started in the Central region and its expanded Empire elsewhere.