This was the beginning of the Third Order of St. Francis, which many persons in the environs of Poggibonzi embraced, and which was soon established in Florence by the congregation of men and women of which we have just spoken. The following year, at latest, the Founder composed a rule for this Order, which he called the Order of the Brethren of Penance, in which the sisters were comprised, which was also called the Third Order, or the Order of Tertiaries, as relative to the two older Orders: the Order of Friars Minors, which is the first, and that of the Poor Clares, which is the second. This rule was subsequently confirmed by Pope Nicholas IV, and Leo XIII, with some changes, which they considered advisable as well in regard to the times as to the Order itself. The holy Patriarch manifests therein not only the zeal which animated him in all that concerned the purity of the faith, but also the prudence which guided all his actions. He requires that all those who apply for admission into the Order shall be carefully examined in the Catholic faith, and their submission to the authority of the Church, and he directs that they shall only be received after having made profession of all the orthodox truths; and that great care shall be taken not to admit any heretic, nor any one suspected of heresy; and should any such be detected after having been admitted, he insists on their being immediately informed against. He, likewise, directs that their previous conduct may be inquired into, to ascertain whether any notorious crimes are imputed to them, or whether their morals are irreproachable, and he desires that they be warned to restore what they have which belongs to any other person; he also forbids receiving any married female into the Order without the consent of her husband. The profession consists in a promise to keep all God's commandments, and to perform such penances as the visitor shall enjoin for faults committed in breach of the practices required by the rule. The habit is similar to what was given to Lucchesio and his wife; but so, that this may be dispensed with, according to the state of life of the persons, and the customs of the country in which they may be. The spiritual exercises laid down in the rule, have nothing in them which can interfere with the different stations of persons living in the world. Days of fasting and abstinence are prescribed, but modified prudently for the infirm, for pregnant women, for travellers, and for laboring people; and it is clearly explained that these observances are not obligatory under pain of sin, and that they only bind the transgressor to perform the penance imposed on him, unless the transgression has at the same time contravened any law of God, or commandment of the Church.