 Complete the following phrase:  On the night of 2324 August 1572, while many prominent Protestants from all over France were in Paris on the occasion of the marriage of Henry of Navarrethe future King Henry IVto 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 