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Ad Diem Illum Laetissimum

Encyclical of Pope St. Pius X, issued to mark the fiftieth anniversary of the proclamation of the Immaculate Conception as a dogma. Promulgated 2 February, 1904.

Submitted in section: Denominations: Catholicism: Saints: M: Blessed Virgin Mary: Doctrine: Immaculate Conception: Ad Diem Illum Laetissimum

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