The restoration of order in the Papal States and the suppression of the robbers who terrorised peaceful citizens were the first work to which he directed his attention. Nor was it long till the severe and almost extreme measures he adopted, and in which he was supported by the Italian princes, produced their effect. The bankrupt condition of the papal treasury necessitated a close revision of the papal finances, and so well did Sixtus V. succeed in this respect that he was able to bequeath to his successor immense reserves. Though very careful about expenditure for his own uses or on the papal court he spent money freely on the erection and decoration of churches, and on the improvement of the city of Rome. He extended the Vatican Library, in connexion with which he established a new printing-press, provided a good water supply (/Acqua Felice/), built the Lateran Palace, completed the Quirinal, restored the columns of Trajan and Antoninus, erected the obelisks of the Vatican, St. Mary Major, the Lateran and Santa Maria del Popolo, and built several new streets to beautify the city and to prevent congestion. His administrative ability manifested itself in the establishment of various congregations, to each of which was committed some particular department of work in the administration of the Church and of the Papal States. Hitherto most of this work had been done by the /auditores/ or the /penitentiarii/ according as it belonged to the external or internal forum, or else in consistories of the cardinals. The idea of Sixtus V. was not entirely a novel one. The Congregation of the Index (1571) and the Holy Office (1588) had been established already, as also a commission to watch over the execution of the decrees of the Council of Trent (1564). By the Bull, /Immensa Aeterni Dei/[6] (11th Feb. 1588) Sixtus V. established fifteen different congregations, the most important of which were the Congregation of the Index, of the Inquisition, of the Signatura, of the Council of Trent, of Rites and Ceremonies, and of Bishops and Regulars. By means of these various bodies the work was done better and more expeditiously without impairing in the slightest the authority of the Pope. In 1586 he issued the Bull, /Postquam verus/ by which he fixed the number of cardinals at seventy, namely, six cardinal-bishops, fifty cardinal-priests and fourteen cardinal-deacons. He had prepared and published a new edition of the Septuagint (1588) as a preparation for the revised edition of the Vulgate, which was brought out later, and was of so faulty a character that it was necessary to withdraw it from circulation.