Rise of the Ayutthaya Kingdom

Timeline

1. 1351Ayutthaya · ThailandUthong moved the capital from Phra Nakhon Si Ayutthaya, naming it after Ayutthaya in the Indian epic Ramayana, proclaimed himself Ramathipodi I, and declared the founding of the Ayutthaya Kingdom.
2. 1352–1356Chao Phraya River basin · ThailandThrough marriages, campaigns, and alliances, Ramathipodi I gradually brought the cities of the lower Chao Phraya River and its banks into Ayutthaya's ruling system, weakening Sukhothai's suzerainty and establishing Ayutthaya's central position in Siam.
3. 1357–1360Ayutthaya · ThailandUnder Ramathipodi I, an early tradition of written codes based on Mon-Khmer legal traditions was established; the surviving Three Seals Code is a legal compilation compiled by the Bangkok dynasty in 1805, some of whose provisions trace back to the early Ayutthaya period. Theravada Buddhism was vigorously supported, monasteries built, and Mon and Sri Lankan sangha traditions absorbed, laying the religious-cultural foundations of the Ayutthaya state.