Guy Tachard

Chevalier de Chaumont with the Jesuits presents a letter from Louis XIV to King Narai, in 1685.

Guy Tachard (; 1651 – 1712), also known as Père Tachard, was a French Jesuit missionary and mathematician of the 17th century, who was sent on two occasions to the Kingdom of Siam by Louis XIV. He was born in Marthon, near Angoulême.

In 1680, Tachard went to the Caribbean (Antilles) with Jean II d'Estrées.

Tachard was involved in embassies to Siam, which came as responses to embassies sent by the Siamese King Narai to France in order to obtain an alliance against the Dutch.

First embassy to Siam (1685) Tachard was sent in 1685 with five other Jesuits under Superior Jean de Fontaney, on a first French embassy to Siam led by Chevalier de Chaumont and François-Timoléon de Choisy, and accompanied by Claude de Forbin. The objective of the Jesuits was to complete a scientific expedition to the Indies and China. Enticed by the Greek Constantine Phaulkon, he returned to France to suggest an alliance with the king of Siam Narai to Louis XIV.

The five other Jesuits Fathers continued to China where they arrived in February 1688: Jean de Fontaney (1643–1710), Joachim Bouvet (1656–1730), Jean-François Gerbillon (1654–1707), Louis Le Comte (1655–1728) and Claude de Visdelou (1656–1737).

The two ships of the embassy returned to France with a Siamese embassy on board, led by the Siamese ambassador Kosa Pan, who was bringing a proposal for an eternal alliance between France and Siam. The embassy stayed in France from June 1686 to March 1687.

Second embassy to Siam (1687) A second embassy to Siam was sent in March 1687. organized by Colbert, of which Tachard was part again. The embassy consisted in five warships, led by General Desfarges, and was bringing the Siamese embassy home.

The mission was led by Simon de la Loubère and Claude Céberet du Boullay, director of the French East India Company. A young Jesuit had been brought by Tachard: the future composer André Cardinal Destouches. However, apart from the reaffirmation of the 1685 commercial treaty, the mission achieved little else.

Embassy to France and Rome (1688)

King Narai dispatched the third Siamese mission to France and Rome in January 1688. Tachard accompanied 3 Siamese envoys Ok-khun Chamnan, Ok-khun Wiset Puban, Ok-muen Pipith Raja. Ok-khun Chamnan led the mission.

Tachard travelled a fifth time to Asia and died in the Indian city Chandernagor in 1712.

Works Tachard, Guy (1688) A relation of the voyage to Siam : performed by six Jesuits sent by the French king, to the Indies and China in the year 1685 (Google Books: original, English translation) Tachard, Guy (1689) Second Voyage (Google Books) Guy Tachard, Michael Smithies, Choisy, Simon de la Loubère (2000) A Siamese Embassy Lost in Africa 1686: The Odyssey of Ok-khun Chamnan, Silkworm Books, Cape of Good Hope (South Africa),