The Ayutthaya Kingdom or the Empire of Ayutthaya was a Thai kingdom that existed in Southeast Asia from 1351 to 1767, centered around the city of Ayutthaya, in Siam, or present-day Thailand. European
Ruin in Si Thep, which was speculated to be Dvaravati's Ayojjhapura, the predecessor to Ayodhya.
Image of Siamese mercenaries of Xiān in Angkor Wat, dated the 12th century. The Siamese later became a major rival of Angkor.
Wat Phanan Choeng, founded in the pre-Ayutthaya period during the reign of Ayodhya's King Sai Nam Peung (r. 1111–1165)
Ayutthaya attack and subjugation of the Malay peninsula and Sumatra between the 13th–16th century, according to Chris Baker: Ayutthaya rising from land or sea?
Siam Confederation, Xiān or Siam was a confederation of maritime-oriented port polities along the present Bay of Bangkok, including Ayodhya, Suphannabhum, and Phrip Phri, as well as Nakhon Si Thammara
Phip Phli Kingdom in 1196, one of the Xian states.