Ineffabilis Deus

Aranjuez Immaculate Conception (c. 1675) by Murillo

Ineffabilis Deus (Latin for 'Ineffable God') is an apostolic constitution[1][2] by Pope Pius IX.[3] It defines the dogma of the Immaculate Conception of the Blessed Virgin Mary. The document was promulgated on December 8, 1854,[4] the date of the annual Solemnity of the Immaculate Conception, and followed from a positive response to the encyclical Ubi primum.

Mary's immaculate conception is a pronouncement made ex cathedra and is therefore considered by the Catholic Church to be infallible through the extraordinary magisterium.

  1. ^ "CATHOLIC LIBRARY: Ineffabilis Deus (1854)". www.newadvent.org. Retrieved 2020-11-16.
  2. ^ "Pius IX's Ineffabilis Deus (Defining the Immaculate Conception) | EWTN". EWTN Global Catholic Television Network. Retrieved 2020-11-16.
  3. ^ Ineffabilis Deus Papal Encyclicals Online. Retrieved December 7, 2012
  4. ^ "The Immaculate Conception of the B.V.M." iBenedictines. 8 December 2011. Archived from the original on 2020-11-30. Retrieved 2020-12-11.

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