Ineffabilis Deus – Apostolic Constitution of the Supreme Pontiff Defining the Dogma of the Immaculate Conception (Bl. Pius IX – Dec. 8, 1854) Ineffabilis Deus – Apostolic Constitution of the Supreme Pontiff Defining the Dogma of the Immaculate Conception (Bl. Pius IX – Dec. 8, 1854)
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