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In his Apostolic constitution Ineffabilis Deus, Pope Pius IX proclaims the dogmatic definition of Immaculate Conception, which holds that the Blessed Virgin Mary was conceived free of Original Sin.
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Apostolic constitution
Catholic legislation
An apostolic constitution is the most solemn form of legislation issued by the Pope.Source: Wikipedia (CC BY-SA)
Ineffabilis Deus
1854 apostolic constitution issued by Pope Pius IX
Ineffabilis Deus is an apostolic constitution by Pope Pius IX. It defines the dogma of the Immaculate Conception of the Blessed Virgin Mary. The document was promulgated on December 8, 1854, the date of the annual Solemnity of the Immaculate Conception, and followed from a…Source: Wikipedia (CC BY-SA)
Pope Pius IX
Head of the Catholic Church from 1846 to 1878
Pope Pius IX was head of the Catholic Church from 1846 to 1878. His reign of nearly 32 years is the longest verified of any pope in history; if including unverified reigns, his reign was second to that of Peter the Apostle. He was notable for convoking the First Vatican Council…Source: Wikipedia (CC BY-SA)
Papal infallibility
Dogma of the Catholic Church
Papal infallibility is a dogma of the Catholic Church which states that, in virtue of the promise of Jesus to Peter, the Pope when he speaks ex cathedra is preserved from the possibility of error on doctrine "initially given to the apostolic Church and handed down in Scripture…Source: Wikipedia (CC BY-SA)
Immaculate Conception
Teaching that Mary was conceived free from original sin
The Immaculate Conception is the doctrine that the Virgin Mary was free of original sin from the moment of her conception. It is one of the four Marian dogmas of the Catholic Church. Debated by medieval theologians, it was not defined as a dogma until 1854, by Pope Pius IX in…Source: Wikipedia (CC BY-SA)
Mary, mother of Jesus
Mother of Jesus
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Original sin
Christian doctrine about human nature
Original sin in Christian theology refers to the condition of sinfulness that all humans share, which is inherited from Adam and Eve due to the Fall, involving the loss of original righteousness and the distortion of the Image of God. The biblical basis for the belief is…Source: Wikipedia (CC BY-SA)