His Holiness Pope Pius XI

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. When, in 1914, Mgr. Ratti became Prefect of the Vatican Library, he brought to the task all his previous preparation under his great and venerated master, Ceriani, and his subsequent training in the management of th...