Brief synthesisThe Historic City of Ayutthaya, founded in 1350, was the second capital of the Siamese Kingdom. Criterion (iii): The Historic City of Ayutthaya bears excellent witness to the period of development of a true national Thai art. AuthenticityThe Historic City of Ayutthaya is well-known from historical records. Protection and management requirementsThe Historic City of Ayutthaya is managed as a historical park. The budget for the conservation and development of the Historic City of Ayutthaya is allocated by the Government and the private sector.