Letters (St. Pius X) Letter of Holy Father Pius X to our Beloved Son Andrea of the Title of St. Anastasia, Cardinal Ferrari, Archbishop of Milan (Feb. 27, 1906) Letter of Holy Father Pius X to Mr. Cardinal Pietro Respighi Our Vicar General (Nov. 10, 1906) Letter of Holy Father Pius X to the Provisional Directorate of the Economic and Social Union For Italian Catholics (Jan. 20, 1907) Letter of Pope Pius X to our Dear Son Jean Lerolle, President, and to our Dear Sons, the Members of the General Committee of the Catholic Association of French Youth in Paris (Feb. 22, 1907) Letter to Our Dearest Sons, The Cardinals of France on the So-Called Approved Mutualities (Pius X – May 17, 1908) Letter of Holy Father Pius X to the Most Illustrious and Reverend Mons. Francesco Saverio Haberl on the Restoration of the Gregorian Chant (Feb. 18, 1910) Anno Quinquagesimo – Letter of Holy Father Pius X on the Occassion of the Fiftieth Anniversary of the Foundation of L’Osservatore Romano (June 29, 1910) Letter of Holy Father Pius X to Cardinal Pietro Respighi, Vicar of Rome, Approving the Catechism of Christian Doctrine for the Diocese and Ecclesiastical Province of Rome (Oct. 18, 1912)
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