Ayutthaya Thailand Attractions The 16th-18th century temple ruins at Ayuthaya, 86km north of, date from the most flourishing period of. Ayuthaya was the Thai capital from 1350, and 33 kings of various Siamese dynasties reigned here until the city was conquered by the Burmese in 1767. The old capital was, by all accounts, a splendid city which was courted by Dutch, Portuguese, French,