St. Bartholomew's Day massacre
1572 CE.
Shown on the map at 48.857°, 2.352°.
The Saint Bartholomew's Day massacre (French: Massacre de la Saint-Barthélemy) in 1572 was a targeted group of assassinations and a wave of Catholic mob violence directed against the Huguenots (French Calvinist Protestants) during the French Wars of Religion. Traditionally believed to have been instigated by Queen Catherine de' Medici, the mother of King Charles IX, the massacre started a few days after the marriage on 18 August of the king's sister Margaret to the Protestant King Henry III of Navarre. Many of the wealthiest and most prominent Huguenots had gathered in largely Catholic Paris to attend the wedding. The massacre began in the night of 23–24 August 1572, the eve of the Feast of Saint Bartholomew, two days after the attempted assassination of Admiral Gaspard de Coligny, the military and political leader of the Huguenots. King Charles IX ordered the killing of a group of Huguenot leaders, including Coligny, and the slaughter spread throughout Paris. Lasting several weeks in all, the massacre expanded outward to the countryside and other urban centres.
Text from the Wikipedia article St. Bartholomew's Day massacre, licensed CC BY-SA 4.0.