History · Anniversaries
175th anniversary: Pope Pius IX promulgated the apostolic constitution Ineffabilis Deus,...
Sat, December 8, 2029
in 3 yr
In 1854, Pope Pius IX promulgated the apostolic constitution Ineffabilis Deus, proclaiming the dogmatic definition of the Immaculate Conception, which holds that the Virgin Mary was conceived free of original sin.
Also on Dec 8, 2029
Source, method and history
- Source
- Wikipedia
- How we know
- Wikipedia "On this day" selected anniversary, 175 years (1854 to 2029).
- Recurs
- annual
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- Changes
- 2026-09-25: added to 2029-12-08