By opening a house in Paris in 1624 St. Vincent took the first practical step towards the foundation of a religious congregation, that was destined to renew and to strengthen religion in France. Later on the society received the sanction of the Archbishop of Paris,[12] and of Louis XIII., and finally it was approved by Urban VIII. in the Bull, /Salvatoris Nostri/, dated 12th January 1632. In the same year St. Vincent took possession of the priory of St. Lazare placed at his disposal by the canons regular of St. Victor. The Congregation of the Mission was to be a congregation of secular clergymen, bound by simple religious vows. Its principal work, besides the sanctification of its own members, was to give missions to the poor particularly in country districts, and to promote a high standard of clerical life. The bishops of France were delighted with the programme of the new congregation. Invitations poured in from all sides on the disciples of St. Vincent asking them to undertake missions, and wherever they went their labours were attended with success. As a rule St. Vincent established a confraternity of charity in the parishes that he visited to help the poor and above all to look after the homeless orphans.[13] It was not long until he discovered that, however successful his missions might be, they could effect little permanent good unless the priests in charge of the parishes were determined to continue the work that had been begun, and to reap the harvest which the missioners had planted. At that time there were no seminaries in France, so that candidates for the priesthood were ordained on the completion of their university course without any special training for their sacred office. At the request of some of the bishops St. Vincent determined to give retreats to those who were preparing for Holy Orders. At first these retreats lasted only ten days, but they were productive of such splendid results that they were extended to several months. Finally they led to the establishment of clerical seminaries, of which institutions St. Vincent and his associates took charge in several of the dioceses of France. Before his death they had control of eleven French seminaries; and at the time of the Revolution fully one-third of the diocesan seminaries were in the hands of his disciples.[14] By means of retreats for the clergy, and spiritual conferences organised for their improvement St. Vincent kept in close touch with those whom he had trained, and afforded them an opportunity of renewing their fervour and completing their education.