The Diet was convened to meet at Augsburg in April 1530, but it was the middle of June before the Emperor, accompanied by the papal legate, made his formal entrance into the city. On the following day the feast of Corpus Christi was celebrated with the customary solemnities, and the Emperor was pained deeply when he learned that the Protestant princes refused to be present or to take any part in the function. At the opening of the Diet it was agreed that the religious question should take precedence, and the Protestant princes were invited to make a clear statement of their doctrines and demands. Luther himself could not be present on account of the decree of Worms, and hence the duty of preparing a complete exposition of the Protestant doctrine devolved upon the ablest of his lieutenants, Philip Melanchthon. He drew up and presented to the Diet the document known as the /Augsburg Confession/ (/Confessio Augustana/), accepted by Luther himself as a masterly though perhaps too moderate statement of the new teaching. The Confession was divided into two parts, the former of which consisted of twenty-one articles or dogmas of faith received by himself and his friends; the latter dwelt with what he termed abuses which they rejected, notable amongst these being celibacy of the clergy, monastic vows, auricular confession, private masses, communion under one kind, abstinence, and episcopal government. The Confession was drawn up very skilfully, great prominence being given to the doctrines on which all Christians were agreed, while the distinctive tenets of the Protestant reformers were put forward in their mildest and least offensive form. The document was read to the Diet in German by Bayer, Chancellor of the Elector of Saxony, and undoubtedly it produced a marked impression on the assembly. The Emperor held a conference with the Catholic princes, some of whom advocated prompt recourse to the sternest measures. Others, however, amongst them being several of the ecclesiastical princes, misled by the temperate and, in a certain sense, misleading character of Melanchthon's statement, and believing that a peaceful solution to the religious difficulty was still possible, urged Charles V. to abstain from decisive action. It was agreed that the work of examining and refuting the Augsburg Confession should be entrusted to a certain number of Catholic theologians, the most prominent of whom were Eck, Cochlaeus, and Conrad Wimpina.[29] Unfortunately these men allowed their natural feelings of irritation to overcome their judgment, and not content with a calm and judicial refutation of the document submitted to them, they attacked warmly the exaggerations, contradictions, and misrepresentations of Catholic doctrine of which Luther had been guilty, and succeeded in imparting to their reply a bitter and ironical tone more likely to widen than to heal the division. At the request of the Emperor they modified it very