of the state", who were mostly nobles. The Huguenots of religion were influenced by John Calvin's works and established Calvinist synods. They were determined to end religious oppression. The Huguenots of the state opposed the monopoly of power the Guise family had and wanted to attack the authority of the crown. This group of Huguenots from southern France had frequent issues with the strict Calvinist tenets that are outlined in many of John Calvin's letters to the synods of the Languedoc. Criticism and conflict with the Catholic Church Like other religious reformers of the time, Huguenots felt that the Catholic Church needed a radical cleansing of its impurities, and that the Pope represented a worldly kingdom, which sat in mocking tyranny over the things of God, and was ultimately doomed. Rhetoric like this became fiercer as events unfolded, and eventually stirred up a reaction in the Catholic establishment. Fanatically opposed to the Catholic Church, the Huguenots killed priests, monks, and nuns, attacked monasticism, and destroyed sacred images, relics, and church buildings. Most of the cities in which the Huguenots gained a hold saw iconoclast riots in which altars and images in churches, and sometimes the buildings themselves torn down. Ancient relics and texts were destroyed; the bodies of saints exhumed and burned. The cities of Bourges, Montauban and Orléans saw substantial activity in this regard. The Huguenots transformed themselves into a definitive political movement thereafter. Protestant preachers rallied a considerable army and a formidable cavalry, which came under the leadership of Admiral Gaspard de Coligny. Henry of Navarre and the House of Bourbon allied themselves to the Huguenots, adding wealth and territorial holdings to the Protestant strength, which at its height grew to sixty fortified cities, and posed a serious and continuous threat to the Catholic crown and Paris over the next three decades. The Catholic Church in France and many of its members opposed the Huguenots. Some Huguenot preachers and congregants were attacked as they attempted to meet for worship. The height of this persecution was the St. Bartholomew's Day massacre in August, 1572, when 5,000 to 30,000 were killed, although there were also underlying political reasons for this as well, as some of the Huguenots were nobles trying to establish separate centres of power in southern France. Retaliating against the French Catholics, the Huguenots had their own militia. Reformation and growth Early in his reign, Francis I ()