Francis II. who lived only one year (1559-60) succeeded, and he was followed by Charles IX. (1560-74). The latter of these was a mere child, and during the minority the government of the country was in the hands of Catharine de' Medici, his mother, who became regent of France. At the court two parties struggled for supremacy, the family of Guise which stood for Catholicism, and the Bourbons who favoured Calvinism. The regent, not being a woman of very decided religious convictions or tendencies, set herself to play off one party against the other so as to increase her own power, and in this way a splendid opportunity was given to the Calvinists to pursue their religious campaign. Several of the more powerful people in the kingdom favoured their schemes solely out of hatred to the Duke of Guise[3] and with the hope of lessening his power. Amongst the prominent Calvinist leaders at this period were Antoine de Bourbon,[4] King of Navarre, and his brother Louis Prince de Conde, the Constable de Montmorency and Admiral Coligny,[5] the recognised head and ablest leader of the Huguenot party. Taking advantage of the bitter feeling aroused amongst their followers by the execution of some of their number, the Huguenots formed a conspiracy (Tumult of Amboise 1560) to seize the young king, to overthrow the Duke of Guise, and to set up in his place the Prince de Conde. The Calvinist theologians, having been consulted about the lawfulness of such an enterprise, declared that the conspirators might proceed without fear of sinning so long as a prince of the royal family was amongst their leaders. The plot was discovered, however, before their plans were matured, and several of those who took part in it were put to death. Instead of weakening, it served only to strengthen the family of Guise. Francis, Duke of Guise, was appointed a lieutenant-general of France with the title of saviour of his country, while his brother, the Cardinal of Lorraine, became chief inquisitor and one of the papal legates appointed for the reform of abuses in France. The King of Navarre, to whom Pius IV. addressed a personal appeal, confessed his unfaltering loyalty to the Catholic religion, although at the same time he was doing much to spread Calvinism in his own dominions and throughout the South of France. Though the royal edict against the Calvinists, published in 1560, was severe, yet little was done to enforce its terms except against those who had recourse to arms. The Prince de Conde organised a new conspiracy and attempted to secure Lyons. He was arrested, tried, and condemned to death, but before the sentence could be carried out Francis II. passed away.