Paris in the 16th century Wars of Religion (1562-1598). Paris was the stronghold of the Catholic League. On the night of August 23–24, 1572, while many prominent Protestants from all over France were in Paris on the occasion of the marriage of Henri of Navarre—the future Henry IV—to Margaret of Valois, sister of Charles IX, the royal council decided to assassinate the leaders of the Protestants. The targeted killings quickly turned into a general slaughter of Protestants by Catholic mobs, known as St. Bartholomew's Day massacre, and continued through August and September, spreading from Paris to the rest of the country. About three thousand Protestants
Christianity in the 16th century of the 16th century, but Counter-Reformation efforts in the 17th century reconverted a majority of the kingdom to Catholicism. A significant Protestant minority remained, most of it adhering to the Calvinist faith. The Counter-Reformation, or Catholic Reformation, was the response of the Catholic Church to the Protestant Reformation. The essence of the Counter-Reformation was a renewed conviction in traditional practices and the upholding of Catholic doctrine as the source of ecclesiastic and moral reform, and the answer to halting the spread of Protestantism. Thus it experienced the founding of new religious orders, such as the Jesuits, the establishment of seminaries