Ayutthaya was founded in 1350 by King U-Thong. It was the capital of Thailand (then called Siam) for 417 years from 1350 . During this era, now usually referred as the Ayutthaya period or Ayutthaya kingdom, Ayutthaya was ruled by 33 kings of 5 different dynasties. The Kingdom became a major regional player, and a trade center of the East, a meeting point of European merchants and Asian traders. Notable monarchs during the Ayutthaya period include King Naresuan the Great, who liberated Ayutthaya from the first Burmese occupation and embarked on a reign of conquest, and King Narai the Great, who initiated diplomatic relations with France, during the reign of Louis XIV. His reign was the golden age of trade and culture.