Ayutthaya historical park covers the ruins of the old city of Ayutthaya, central Thailand, which was founded by King Ramathibodi I in 1350 and was the capital of Siam until its destruction by the Burmese army in 1767. Thirty-three monarchs including King Rama IV governed from Ayutthaya. The ruins include a great many Buddhist temples and shrines. In 1969 renovations began on the ruins, and the park was declared a UNESCO World Heritage Site in 1991.