The Phra Nakhon Si Ayutthaya or Ayutthaya in short, is one of Thailand's historical and majestic highlights. Serving as the Thai capital for 417 years (1350 1767: Kingdom of Ayutthaya), it was once glorified as one of the biggest cities in Southeast Asia. During the 17th century, most foreign visitors to Ayutthaya, traders or diplomats alike, claimed Ayutthaya to be the most illustrious and glittering city that they had ever visited. The map of Ayutthaya published in 1691 by Simon de la Loubere in Du Royaume De Siam is proof of such recognition.

The Kingdom of Ayutthaya reached its apex in terms of sovereignty, military might, wealth, culture, and international commerce in the 16th century when the Kingdoms territory was extended far beyond present-day Laos, Cambodia, and Myanmar. Ayutthaya even had diplomatic relations with Louis XIV of France and was courted by Dutch, Portuguese, English, Chinese and Japanese merchants.
Visitors can explore and appreciate Thai history in Phra Nakhon Si Ayutthaya, which is situated only 86 kilometers north of Bangkok. Visitors to Ayutthaya can marvel at its grandeur reflected through numerous magnificent structures and ruins concentrated in and around the city island surrounded by Maenam Chao Phraya, Maenam Pa Sak and Maenam Lopburi.

More importantly,Phra Nakhon Si Ayutthaya Historical Park, an extensive historical site in the heart of Ayutthaya city, has been included in UNESCO's World Heritage list since 13 December, 1991.