The opportunity came on the occasion of the marriage between the King of Navarre and Margaret of Valois. The leading Calvinists anxious to take part in the ceremony flocked to Paris, where they and their followers paraded the streets armed to the teeth and with the air of conquerors. Catharine de' Medici took steps to secure the murder of Coligny on the 22nd August, 1572, but the attempt failed. Such a step served, however, to embitter feelings on both sides, and to arouse the queen-mother to make one final effort for the destruction of her Huguenot opponents. In an audience with the king she represented to him that the Calvinists were plotting to take his life, and that the only way to secure himself against them was to anticipate them. In view of the previous history of the party and the suspicious temperament of the king, it required little to convince him of the truth of this allegation, and at last he signed an order that on a certain pre-arranged signal having been given the soldiers should let loose on the Huguenots. On the night preceding the feast of St. Bartholomew (23-24 Aug.) the bells of the church of St. Germain-en- Laye were rung, and the troops sallied forth to carry out their instructions. Rumours of a Huguenot plot had been spread through the city. The people were alarmed, and the general body of the citizens took up arms to support the soldiers. In the melee that followed over a thousand Calvinists including Coligny were put to death. The movement spread through the provinces where about the same number suffered as in the capital, though many of the Catholic clergy, as for example, the Bishop of Lisieux, exerted themselves to put an end to the butchery.