The Piarists or Patres Piarum Scholarum were founded by St. Joseph Calazansa[10] (1556-1648), who had been vicar-general of the diocese of Urgel in Spain, an office which he resigned in order to betake himself to Rome. Here he began to gather the poorer children for instruction, and as the teachers were unwilling to assist him unless they were given extra remuneration, he opened a free school in Rome in 1597. The school was taught by himself and two or three priests whom he had interested in the work. From these unpretentious beginnings sprang the society of the Fathers of the Pious Schools. The object of the society, which was composed of priests, was the education of the young both in primary and secondary schools. The society was approved by Paul V., and established finally as a recognised institution by Gregory XV. (1621). It spread rapidly into Italy, Austria, and Poland. Somewhat akin to the Piarists were the Fathers of Christian Doctrine, founded by Caesar de Bus for the purpose of educating the young. The society was composed of priests, and received the approval of Clement VIII. in 1597. Later on it united with the Somaschans, who had been established by St. Jerome Aemilian with a similar purpose, but on account of certain disputes that arose the two bodies were separated in 1647. The Brothers of the Christian Schools were founded by John Baptist de la Salle[11] (1651-1719). The founder was a young priest of great ability, who had read a distinguished course in arts and theology before his ordination. Having been called upon to assist in conducting a free school opened at Rheims in 1679 he threw himself into the work with vigour, devoting nearly all his energies to the instruction of the teachers. These he used to gather around him after school hours to encourage them to their work, to suggest to them better methods of imparting knowledge and generally to correct any defects that he might have noticed during the course of his daily visits to the schools. In this way he brought together a body of young men interested in the education of the children of the poor, from which body were developed the Brothers of the Christian Schools. At first he intended that some of the congregation should be priests, but later on he changed his mind, and made it a rule that none of the Brothers should become priests, nor should any priest be accepted as a novice. For a long time the holy founder was engaged in an uphill struggle during which the very existence of the institute was imperilled. Distrusted by some of the ecclesiastical authorities, attacked by enemies on all side, deserted by a few of his own most trusted disciples, a man of less zeal and determination would have abandoned the project in despair. But de la Salle was not discouraged. He composed a constitution for his followers, and in 1717 he held a general chapter, in which he secured the election of a superior-general. From this time the