Constance Phaulkon (born ??sta?t?? Ge????? - Costantin Gerachi) or Constantinos Gerakis (?e???? - geraki is the Greek word for falcon). Known by the French as Monsieur Constance; the Thai ????????? ?????????? - Chao Phraya Vichayen and the Portuguese Constantino Falc鉶 (1647 - June 5; 1688) was a Greek adventurer; who became first counsellor to King Narai of Ayutthaya.

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 fifteenth 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. The king stayed here for about eight months a year. Today; Lopburi is renowned for its Crab-Eating Macaques that live amid the Khmer temple ruins of the city.