The Tridentine Index, presented with the full authority of the Church represented by the Pope (Pius IV) and the general council, and compiled after due deliberation, by a representative commission of scholarly divines, secured a much wider distribution and more general acceptance than had been obtained by the first of the papal Indexes or than could have been expected for the comparatively local Indexes of Louvain, Venice, or Valladolid. The Index was printed in 1564, either separately or in connection with the record of the Decrees of the Council of Trent, in Bologna, Modena, Florence, Cremona, Venice, Cologne, and Dillingen, and during the remaining years of the century, in a great number of editions. Within the next thirty years, there were no less than ten issues from the presses of Venice (which was still one of the most important centres of the printing industry) and four from Cologne. Throughout the Catholic world, the interest was active and continued in the proceedings and conclusions of the council which had undertaken the task of cleansing the Church from its inner evils and of fortifying its institutions against the assaults of the heretics without. The deliberate policy of the Church in regard to the supervision of books was expressed in the Ten Rules of its Index and in the accompanying lists of prohibited books and of condemned authors, and these rules and lists now came to the eyes of thousands of readers (or were cited to them by their teachers and confessors) who had never before known of ecclesiastical censorship. According to the understanding of the Curia, no formal acceptance or confirmation was required to make binding in the lands acknowledging the authority of the Church either the Bull or the Index, but this was not the view generally taken.