The Tai ethnic group migrated into mainland Southeast Asia over a period of centuries. The word Siam may have originated from Pali, Sanskrit श्याम, or Mon ရာမည, with likely the same root as Shan and Ahom. Xianluo was the Chinese name for the Ayutthaya Kingdom, merged from Suphannaphum city-state, centered in modern-day Suphan Buri; and Lavo city-state, centered in modern-day Lop Buri. To the Thai, the name of their country has mostly been Mueang Thai.
Khmer period sculpture of Vishnu c. tenth century CE.
A 13 meter long reclining Buddha, Nakhon Ratchasima.
The Khmer temple of Wat Phra Prang Sam Yod, Lopburi.
A Buddha from Wat Kukkut, Lamphun
The Ayutthaya Kingdom or the Empire of Ayutthaya was a Mon and later Siamese kingdom that existed in Southeast Asia from 1351 to 1767, centered around the city of Ayutthaya, in Siam, or present-day Thailand. European travellers in the early 16th century called Ayutthaya one of the three great powers of Asia. The Ayutthaya Kingdom is considered to be the precursor of modern Thailand, and its developments are an important part of the history of Thailand.
Three pagodas of Wat Phra Si Sanphet which house the remains of King Borommatrailokkanat, Borommarachathirat III, and Ramathibodi II
Wat Phra Phutthabat, Saraburi, constructed by King Songtham as a royal pilgrimage site
Wat Chaiwatthanaram, constructed by King Prasat Thong during the Age of Peace and Commerce (1600–1688)
Painting by Johannes Vingboons of Ayutthaya, c. 1665.
