• Ad diem illum laetissimum is an encyclical of Pope Pius X on the Immaculate Conception, dated 2 February 1904, in the first year of his Pontificate. It...
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    1987) | John Paul II". www.vatican.va. Retrieved 2020-06-20. "Ad Diem Illum Laetissimum (February 2, 1904) | PIUS X". w2.vatican.va. Retrieved 2020-06-20...
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    July 6, 2011 Archived July 13, 2013, at the Wayback Machine "Ad Diem Illum Laetissimum (February 2, 1904) | Pius X". www.vatican.va. Retrieved 2023-08-10...
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    Catholic Devotions and Practices ISBN 0-87973-910-X page 515 Ad diem illum laetissimum, 10 AAS 1921, 345 AAS 1916, 146 Schmidlin 179-339 C VII, §50 AAS...
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  • the Restoration of All things in Christ 4 October 1903 [1] 2. Ad diem illum laetissimum On the Immaculate Conception 2 February 1904 [2] 3. Iucunda sane...
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    Alberdingk Thijm" . Catholic Encyclopedia. Vol. 14. Pope Pius X. "Ad Diem Illum Laetissimum (February 2, 1904)". Encyclicals. vatican.va. Libreria Editrice...
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  • Subject On the restoration of all things in Christ Number 1 of 17 of the pontificate Text In Latin In English ← Dum multa   Ad diem illum laetissimum →...
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