Pierre Joseph Georges Pigneau (2 November 1741Baptismal certificate – 9 October 1799), commonly known as Pigneau de Béhaine (), also Pierre Pigneaux, Bá Đa Lộc (Pedro"Charles Le Gobien and Jean-Baptiste Du Halde. Lettre edifiantes et curieus écrites Des Missions étrangères: Mémoires de la Chine. Lyon: J Venarel, 1819. p. 451 百多祿), Bách Đa Lộc (伯多祿) and Bi Nhu ("Pigneau""Một bộ Từ điển Việt-La tinh viết tay vào cuối thế kỷ XVIII vừa sưu tầm được" trong Tạp chí Hán Nôm 悲柔), was a French Roman Catholic bishop best known for his role in assisting Nguyễn Ánh (later Emperor Gia Long) to establish the Nguyễn dynasty in Vietnam after the Tây Sơn rebellion.

Early life Pierre Pigneau was born in Origny-en-Thiérache (later Aisne, France), where the family of his mother lived. His father's family owned a small estate named Béhaine, in the nearby parish of Marle. Despite the particule "de Béhaine" in his name, Pigneau was not of noble extraction, and it seems the particule first appeared only in the 1787 Treaty of Versailles.Mantienne, p.204

Pigneau de Behaine was trained as a missionary and sent abroad by the Paris Foreign Missions Society (Séminaire des Missions Étrangères). He left France from the harbour of Lorient in December 1765, to work in southern Vietnam. He landed in Pondicherry, then a French possession in India, on 21 June 1766.Mantienne, p.37

Pigneau had arrived just prior to the Burmese capture of Ayutthaya in Siam. After waiting for a few months in the Portuguese colony of Macau, Pigneau travelled on a Chinese ship to reach the small coastal town Hà Tiên in Cochinchina (Southern Vietnam) near the Cambodian border, set up by missionaries who had been displaced by the Burmese. He arrived there in March 1767.Mantienne, p.40–48

Superior of the College General (1767–1774) In Ha Tien, Pigneau worked as head of the Seminary of the Holy Angels, the seminary established in Asia by the Paris Foreign Missions Society, which had relocated from Ayutthaya in Siam following the 1765 Burmese invasion, with approximately forty students of Chinese, Siamese, and Vietnamese extraction.

In 1768, the missionaries were jailed for three months when Siamese authorities complained to the local ruler Mạc Thiên Tứ that the school had afforded shelter to a fugitive Siamese prince. Pigneau was put into a cangue, a wooden and iron frame fastened around his limbs weighing eight pounds.Mantienne, pp.40–41 He ignored family requests to return to France, saying that his missionary work was more important than a comfortable life. In 1769, the school was attacked by Chinese and Cambodian pirates, who massacred some of the students and burnt down the establishment...Mantienne, p.53 Pigneau was forced to flee in December 1769 with the survivors to Pondicherry, then a French territory, after a long sea journey through Malacca. The College was established a few miles from Pondicherry, in Virampatnam.

While in Pondicherry, Pigneau continued mastering Chinese and Vietnamese languages until he was fully conversant with both. In 1773, he compiled a Vietnamese-Latin dictionary with the help of eight southern Vietnamese,Mantiennne, p.67 following in the footsteps of Alexandre de Rhodes. His work, Dictionarium Anamitico-Latinum, would be published in 1838 by Mgr Jean-Louis Taberd.Manteigne, p.67

Pigneau de Behaine was appointed bishop in partibus infidelium of Adran in Syria, and Apostolic Vicar of Cochinchina on 24 September 1771. After his ordination on 24 February 1774 in São Tomé near Madras,Mantienne, p.57Les Missions Etrangeres, p.104 he went to Macau to gather more staff before returning to resume his work in Ha Tien. In Macau, he was able to publish and print a catechism in Vietnamese (containing an introduction in Chinese, the body of the text in the Vietnamese alphabet, and a translation in Latin), and despatched a copy to Rome. He left Macau on 1 March 1775, and reached Ha Tien later in the month, where he again re-established missionary operations.Mantienne, p.73

In 1775-76, Pigneau attempted to convert the Stieng people, but the missionaries he sent suffered greatly, and either fell ill or returned.Mantienne, pp.74–75

Encounter with Nguyễn Ánh

In 1777, the Tây Sơn brothers attacked Saigon and eliminated almost the entire Nguyễn dynasty, with the fifteen-year-old Nguyễn Ánh managing to escape into the far south. He took refuge at Pigneau's seminary from September to October before both were forced to flee to the island of Pulo Panjang in the Gulf of Siam. The move was a political step taken by Pigneau to align himself with Nguyễn Ánh, allowing himself a foray into politics. He became less of a missionary and more of a politician thereafter.

In November 1777, Nguyễn Ánh was able to recapture Saigon, and in 1778 pursued the retreating Tây Sơn as far as Bình Thuận.Mantienne, p.78

In neighbouring Cambodia, a pro-Cochinchinese revolt erupted to topple the pro-Siam king Ang Non. In 1780, Cochinchinese troops intervened, and Pigneau helped them procure weapons from the Portuguese. The Bishop attracted accusations by the Portuguese of manufacturing weapons for the Cochinchinese, especially grenades, a new weapon for Southeast Asia. Pigneau de Behaine also organized the supply of three Portuguese warships for Nguyễn Ánh. In his activities, Pigneau was supported by a French adventurer, Manuel.Mantienne, p.81

In 1782, the Tây Sơn led a new offensive to the South. Manuel died in his command of a warship in the Saigon river against Tây Sơn troops. The defeat, with its battle plan deemed faulty, towers high in the list of setbacks suffered. Nguyễn Ánh was forced to retreat to the island of Phú Quốc. In October 1782, the tide turned again and Nguyễn Ánh and Pigneau returned to Saigon.Mantienne, p.82

In March 1783, the Nguyễn were again defeated, and Nguyễn Ánh and Pigneau once more set sail for Phú Quốc. Sanctuary was at once both fleeting and illusory. They had to escape again when their hideout was discovered, being chased from island to island until they reached Siam. Pigneau de Behaine visited the Siamese court in Bangkok in late 1783.Mantienne, p.83 Nguyễn Ánh also arrived there in February 1784, where he enlisted an army to accompany him back to Vietnam.Mantienne, p.84 In January 1785 however the Siamese fleet met with disaster against the Tây Sơn in the Mekong river.

Nguyễn Ánh again took refuge with the Siamese court, and again tried to seek help from the Siamese.Mantienne, pp.84–85 Resolving to muster any support he could from Western powers., Nguyễn Ánh asked Pigneau to appeal for French aid, and pledged to allow Pigneau to take his son Prince Cảnh with him. Pigneau in return attempted to obtain assistance from Manila, but the party of Dominicans he sent was captured by the Tây Sơn.Mantienne, p.85 From Pondicherry, he also sent a request for help to the Portuguese Senate in Macao, which would ultimately lead to the signature of a Treaty of Alliance between Nguyễn Ánh and the Portuguese on 18 December 1786 in Bangkok.Mantienne, p.87

Embassy to France The party reached Pondicherry in February 1785.Mantienne, p.84, p.200 The French administration in Pondicherry, led by the interim Governor Coutenceau des Algrains, successor of Bussy, seconded by Captain d'Entrecasteaux, was resolutely opposed to intervening in southern Vietnam, stating that it was not in the national interest. In July 1786, Pigneau was allowed to travel back to France to ask the royal court directly for assistance. News of his activities reached Rome where he was denounced by the Spanish Franciscans. Pigneau at that point offered Prince Cảnh and his political mandate to the Portuguese. They left Pondicherry for France in July 1786.Mantienne, p.92 which they reached in February 1787.Mantienne, p.93

Arriving in February 1787 with the child prince Canh at the court of Louis XVI in Versailles,Dragon Ascending by Henry Kamm p.86-87 Pigneau had difficulty in gathering support for a French expedition to install Nguyễn Ánh on the throne. This was due to the poor financial state of the country prior to the French Revolution. Pigneau was helped by Pierre Poivre who had been involved previously in French interests in Vietnam.

Eventually, he was able to seduce military figures with precise instructions as to the conditions of warfare in Indochina and materiel for the proposed campaign. He explained how France would be able to "dominate the seas of China and of the archipelago." The party met with King Louis XVI, Minister of the Navy de Castries and Minister of Foreign Affairs Montmorin on 5 or 6 May 1787.Mantienne, p.96 Prince Cảnh created a sensation at the court of Louis XVI, leading the famous hairdresser Léonard to create a hairstyle in his honour "au prince de Cochinchine".Viet Nam by Nhung Tuyet Tran, Anthony Reid, p.293 His portrait was made in France by Maupérin, and is now on display at the Séminaire des Missions Étrangères in Paris. Prince Cảnh dazzled the Court and even played with the son of Louis XVI, Louis-Joseph, Dauphin of France, who was about the same age."He dazzled the Louis XVI court at Versailles with Nguyen Canh, ... dressed in red and gold brocade, to play with the Dauphin, the heir apparent." in The Asian Mystique: Dragon Ladies, Geisha Girls, and Our Fantasies by Sheridan Prasso, p.40"The Dauphin, about his age, played with him." French Policy and Developments in Indochina – Page 27 by Thomas Edson Ennis

By November, his constant pressure had proved effective. On 21 November 1787, the Treaty of Versailles was concluded between France and Cochinchina in Nguyễn Ánh's name. Four frigates, 1650 fully equipped French soldiers and 250 Indian sepoys were promised in return for Pulo Condore and harbour access at Tourane (Da Nang). De Fresne was supposed to be the leader of the expedition.Mantienne, p.97

The French government, on the eve of the French Revolution, was in dreadful financial trouble,Mantienne, p.106 and saw its position weakened even more with the outbreak of civil war in Holland.Mantienne, p.104 French enthusiasm for Pigneau's plan was severely dampened.Mantienne, p.103-108 A few days after the treaty was signed, the foreign minister sent instructions on 2 December 1787 to the Governor of Pondicherry Thomas Conway, which left the execution of the treaty to his own appreciation of the situation in Asia, stating that he was "free not to accomplish the expedition, or to delay it, according to his own opinion"Mantienne, p.98. Original French: "il était "maître de ne point entreprendre l'opération ou de la retarder, d'après son opinion personnele"" Louis XVI himself told Pigneau that Conway was appointed Governor of Pondicherry simply to remove him from Europe.

Return to Vietnam

The party left France in December 1787 on board the Dryade,Mantienne, p.109-110 commanded by M. de Kersaint and accompanied by the Pandour, commanded by M. de Préville. They would again disembark in Pondicherry from May 1788 to July 1789.Mantienne, p.110 The Dryade was ordered by Conway to continue to Poulo Condor to meet with Nguyễn Ánh and deliver him 1,000 muskets bought in France and Father Paul Nghi, a Cochinchinese missionary devotee of Mgr Pigneau.