an Entity references as follows:
René Charbonneau was 17th century French medical missionary friar and a member of the Siam mission of the Société des Missions Etrangères. He was the first medical missionary to Siam. He arrived in the country in 1677. René Charbonneau first provided his services to the Siamese King Narai as an architect, to establish a wooden fort on the frontier with the country of Pegu.