During the late sixteenth and early seventeenth centuries, Poitou was a hotbed of Huguenot (French Calvinist Protestant) activity among the nobility and bourgeoisie. The Protestants were discriminated against and brutally attacked during the French Wars of Religion (1562–1598). Under the Edict of Nantes, such discrimination was temporarily suspended but this measure was repealed by the French Crown.
Some of the French colonists, later known as Acadians, who settled beginning in 1604 in eastern North America came from southern Poitou. They established settlements in what is now Nova Scotia, and later in New Brunswick—both of which were taken over in the later 18th century by the English, (after their 1763 victory in the Seven Years' War).
After the revocation of the Edict of Nantes in 1685, the French Roman Catholic Church conducted a strong Counter-Reformation effort. In 1793, this effort had contributed to the three-year-long open revolt against the French Revolutionary Government in the Bas-Poitou (Département of Vendée). Similarly, during Napoleon's Hundred Days in 1815, the Vendée stayed loyal to the Restoration Monarchy of King Louis XVIII. Napoleon dispatched 10,000 troops under General Lamarque to pacify the region.
As noted by historian Andre Lampert:
"The persistent Huguenots of 17th Century Poitou and the fiercely Catholic rebellious Royalists of what came be the Vendée of the late 18th Century had ideologies very different, indeed diametrically opposed to each other. The common thread connecting both phenomena is a continuing assertion of a local identity and opposition to the central government in Paris, whatever its composition and identity. (...) In the region where Louis XIII and Louis XIV had encountered stiff resistance, the House of Bourbon gained loyal and militant supporters exactly when it had been overthrown and when a Bourbon loyalty came to imply a local loyalty in opposition to the new central government, that of Robespierre."[5]
Large parts of the Angélique series of historical novels are set in 17th century Poitou.
In Alexandre Dumas's The Man in the Iron Mask, Aramis gives a romantic description of the marshes of Bas-Poitou as the most secluded place to lead a quiet life away from the perils of court.