The preaching of the Indulgences promulgated by Leo X. in Constance was entrusted to the Franciscans. Their work was a difficult one especially as the Grand Council of Zurich forbade them to persist, as, indeed, did also the able and zealous Hugo von Hohenlandenberg, Bishop of Constance, in whose diocese Zurich was situated. Zwingli, confident of the support of the city authorities, attacked the doctrine of Indulgences and was backed by the Grand Council, which ordered, at his instigation, that the Word of God should be preached according to the Scriptures, regardless of tradition or the interpretation of the Church. Later on he directed his attacks against the meritoriousness of good works and the practice of fast and abstinence (1522), and about the same time he addressed a petition to the Bishop of Constance demanding that he should not interfere with the preaching of the pure Word of God nor set any obstacle to the marriage of his priests. He admitted publicly that his relations with women had been disgraceful, that he had learned from his own personal experience how impossible of fulfilment was the vow of chastity, and that marriage was the only remedy that would enable him to overcome the emotions of carnal lust referred to by St. Paul in his epistle to the Corinthians (I. 7, 9). The bishop refused to yield to this demand insisting on the strict observance of celibacy, and appealed to the Grand Council to support him with the full weight of their authority (April 1522).