The episcopal seminaries, intended exclusively for the training of ecclesiastics, were coeval with, if not anterior to, the catechetical schools, for we find the germ of the system in the very earliest apostolic times. They originally formed but part of the bishops' households; and the students were taught by him personally, or by his deputy. When the community life became more general and the number of ecclesiastical pupils increased, the seminaries assumed more extensive proportions, the school being held in the church attached to the bishop's house, but the scholars still living under his roof. Great care was always manifested by the early fathers of the church in the moral and intellectual training of ecclesiastical students. Thus, Pope St. Siricius, in his decretal, A.D. 385, to the Bishop of Tarragona, lays down the following rules to be observed in preparing candidates for the priesthood. He orders that they shall be selected principally from those who have been devoted to the service of the church from childhood. At thirty years of age they are to be advanced through inferior orders to subdiaconate and diaconate, and after five years thus spent they may be ordained priests. In several provincial councils held in the early centuries we find the greatest stress laid on the importance of the careful culture of seminarians, and the second council of Toledo, A.D. 531, fixes the ordination of subdeacons at twenty, and of deacons at twenty-five years of age. As to the course of studies pursued, besides the reading of the Scriptures, the Psalter, and a knowledge of the duties of the holy offices, Latin, Greek, and generally Hebrew were taught, together with the liberal sciences, and sometimes even law and medicine. Thus did the church gradually but firmly lay the foundation of her system. First, by giving to the adult neophyte such instruction as befitted his age and condition, to enable him to become a worthy member of her fold; and next, by providing, under the direct inspection of each bishop, a school where children, disciplined in his household, taught from his mouth and by his example lessons of piety, humility and self-control, and armed with all the resources of sacred and profane learning, were at mature years sent forth to convert a gentile world, and in turn become teachers of men.