The French monarchy boycotted the entire council until the last minute; a delegation led by Charles de Guise, Cardinal of Lorraine finally arrived in November 1562. The first outbreak of the French Wars of Religion had been earlier in the year, and the French had experience of a significant and powerful Protestant minority, iconoclasm and tensions leading to violence in a way Italians and Spaniards did not. [ clarification needed ] Among other influences, the last minute inclusion of a decree on sacred images was a French initiative, and the text, never discussed on the floor of the council or referred to council theologians, was based on a French draft. 
9 “The ministry of catechesis draws ever fresh energy from the councils. The Council of Trent is a noteworthy example of this. It gave catechesis priority in its constitutions and decrees. It lies at the origin of the Roman Catechism, which is also known by the name of that council and which is a work of the first rank as a summary of Christian teaching. .” The Council of Trent initiated a remarkable organization of the Church’s catechesis. Thanks to the work of holy bishops and theologians such as St. Peter Canisius, St. Charles Borromeo, St. Turibius of Mongrovejo or St. Robert Bellarmine, it occasioned the publication of numerous catechisms.
700 bishops could have attended the Council but to start with only 31 turned up along with 50 theologians. By 1563, a total of 270 bishops attended and the vast majority of them were Italian which was a great bonus for the pope as they were under his control and it was the pope who effectively controlled promotion to cardinal etc. and these men would not be seen in public doing anything other than what the pope wanted. The bishops also insisted that they vote as individuals rather than as a block-country vote and as there were 187 Italian bishops, 32 Spanish, 28 French and 2 German the Italians vastly outnumbered the other three countries put together! As such what was to be passed at Trent was what the pope accepted as being acceptable to him.