ฝรั่งเศส france relations cover a period from the 16th century until modern times. A newly formed missionary order, the Paris Foreign Missions Society, initiated contacts between France and Thailand. The first major contacts between the two countries occurred after Thailand was made an apostolic vicariate by Pope Alexander VII on 22 August 1662. In 1664, a group of missionaries led by François Pallu, Bishop of Heliopolis, also of the Paris Foreign Missions Society, joined Lambert in the capital city of Ayutthaya after 24 months overland travel and started missionary work.
In 1669, Louis Laneau, Bishop of Motella, also a member of the Paris Foreign Missions Society, was named head of a Roman Catholic mission in mainland Southeast Asia, with his headquarters at Ayutthaya. During a 1670 trip to France, Pallu obtained from Louis XIV a letter to King Narai, which, together with a letter from the Pope, he remitted in Ayutthaya in October 1673 and which was received with great reverence. These contacts were closely associated with the development of French influence in South Asia, and especially with the establishment of the French East India Company in 1664, and the development of colonial French India. In September 1680, a ship from the French East India Company visited Phuket and left with a full cargo of tin. King Narai further sought to expand relations with the French, to counter Portuguese and Dutch influence in his kingdom, and at the suggestion of his Greek counselor Constantine Phaulkon.
In 1664, the Dutch had used force to exact a treaty granting them extraterritorial rights as well as freer access to trade. Khun Pijaiwanit and Khun Pijitmaitri, requesting the dispatch of a French embassy to Thailand. They met with Louis XIV in Versailles. Chevalier de Chaumont presents a letter from Louis XIV to King Narai. The Chevalier de Chaumont was the first French ambassador for King Louis XIV in Siam. Chevalier de Chaumont tried without success to convert Narai to Catholicism and to conclude significant commercial treaties. A provisional agreement was signed to facilate trade between France and the Royal Warehouse Department.