In the reign of King Na Rai the great [1656 - 1688], diplomatic and commercial connection policy with western countries was started. At this time. Ayutthaya could learn more about new advanced technology from western countries. such as architectural design and new technique of building construction. These can be seen on ancient ruins found both in Ayutthaya and Lopburi.
King Suriyat-Amarin or King Eakatat [1488 - 1767] was the last king of Ayutthaya and it was the second lost of Ayutthaya independence in 1767.