St. Bartholomew's Day massacre St. Bartholomew's Day massacre The St. Bartholomew's Day massacre () 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 took place a few days after the wedding day (18 August) of the king's sister Margaret to the Protestant Henry III of Navarre (the future Henry IV of France). Many of the most wealthy and prominent Huguenots had gathered in largely Catholic Paris
St. Bartholomew's Day massacre 18th-century historian Louis-Pierre Anquetil, in his "Esprit de la Ligue" of 1767, was among the first to begin impartial historical investigation, emphasizing the lack of premeditation (before the attempt on Coligny) in the massacre and that Catholic mob violence had a history of uncontrollable escalation. By this period the Massacre was being widely used by Voltaire (in his "Henriade") and other Enlightenment writers in polemics against organized religion in general. The question of whether the massacre had long been premeditated was not entirely settled until the late 19th century; Lord Acton changed his mind on the matter twice, finally concluding