Phra Nakhon Si Ayutthaya (Thai: พระนครศรีอยุธยา, pronounced ; also spelled "Ayudhya"), or locally and simply Ayutthaya is the capital of Phra Nakhon Si Ayutthaya province of Thailand. Ayutthaya was the capital of the Ayutthaya kingdom. Located on an island at the confluence of the Chao Phraya and Pa Sak rivers, Ayutthaya is the birthplace of the founder of Bangkok, King Rama I. The ruins of the old city are preserved in the Ayutthaya Historical Park.