Due to its geographical region, Thai culture has always been significantly stimulated by India and China in addition to the neighboring cultures of Southeast Asia. However, the first Thai or Siamese state is historically considered to be the Buddhist kingdom of Sukhothai was centered in 1238, followed by the decline and fall of the Khmer empire in the 13th 15th century AD. A century later, Sukhothai’s power was overshadowed by the larger Siamese kingdom of Ayutthaya, based in the mid 14th century. After the sack of Angkor by the Siamese armies in 1431, much of the Khmer court and its Hindu customs were delivered to Ayuthaya, and Khmer customs and rituals were adopted into the courtly culture of Siam. After Ayuthaya fell in 1767 to the Burmese, Thonburi was the capital of Thailand for programming help brief period under King Taksin the Great. The latest Ratthanakosin era of Thai history began in 1782 following the establishment of Bangkok as capital of the Chakri dynasty under King Rama I the Great.