Thailand: The 12th century ruins of Wat Phra Si Rattana Mahathat, Lopburi. The old town of Lopburi dates back to the Dvaravati era (6th - 13th century). It was originally known as Lavo or Lavapura. After the foundation of the Ayutthaya Kingdom in the 15th century, Lopburi was a stronghold of Ayutthaya's rulers. It later became a new royal capital during the reign of King Narai the Great of the Ayutthaya kingdom in the middle of the 17th century.