There is evidence of human habitation in Thailand that
has been dated at 40,000 years before the present.
Similar to other regions in Southeast Asia, Thailand was heavily
influenced by the culture and religions of India, starting with the
Kingdom of Funan around the 1st century CE to the Khmer Empire.
After the fall of the Khmer Empire in the 13th century,
various states thrived there, such as the various Tai, Mon, Khmer
and Malay kingdoms, as seen through the numerous archaeological
sites and artifacts that are scattered throughout the Siamese
landscape. Prior to the 12th century however, the first Thai
or Siamese state is traditionally considered to be the Buddhist
kingdom of Sukhothai, which was founded in 1238.