teaching Latin, written in the vernacular. In that respect he was more advanced than his contemporaries. Calasanz placed great emphasis on the teaching of mathematics. Training in mathematics and science was considered very important in his Pious schools, both for pupils and teachers. But Calasanz's main concern was undoubtedly the moral and Christian education of his students. As both priest and educator, he considered education to be the best way of changing society. All his writing is imbued with his Christian ideals, and the constitutions and regulations of the Pious schools were based on the same spirit. Calasanz created an ideal image of a Christian teacher and used it to train the teachers who worked with him. Calasanz was the first educator to advocate the preventive method: it is better to anticipate mischievous behaviour than to punish it. This method was later developed by John Bosco, the founder of the Salesian schools. In terms of discipline, and contrary to the prevailing philosophy of his own and subsequent eras, Calasanz favored the mildest punishment possible. While believing that punishment was necessary in certain cases, he always preached moderation, love and kindness as the basis of any discipline. Relationship with Galileo and Campanella At a time when humanistic studies ruled the roost, Calasanz sensed the importance of mathematics and science for the future and issued frequent instructions that mathematics and science should be taught in his schools and that his teachers should have a firmer grounding in those subjects. Calasanz was a friend of Galileo Galilei and sent some distinguished Piarists as disciples of the great scientist. He shared and defended his controversial view of the cosmos. When Galileo fell into disgrace, Calasanz instructed members of his congregation to provide him with whatever assistance he needed and authorized the Piarists to continue studying mathematics and science with him. Unfortunately, those opposed to Calasanz and his work used the Piarists' support and assistance to Galileo as an excuse to attack them. Despite such attacks, Calasanz continued to support Galileo. When, in 1637, Galileo lost his sight, Calasanz ordered the Piarist Clemente Settimi to serve as his secretary. Calasanz brought the same understanding and sympathy that he had shown to Galileo to his friendship with the great philosopher Tommaso Campanella (1558–1639), one of the most profound and fertile minds of his time, producing famous philosophical works. Although he was highly controversial as well, Campanella