The Immaculate Conception is a dogma of the Catholic Church maintaining that the Blessed Virgin Mary was kept free of original sin from her moment of conception and was filled with the sanctifying grace normally conferred during baptism. It is one of the four dogmas in Roman Catholic Mariology. Mary is often called the Immaculata (the Immaculate One), particularly in artistic and cultural contexts.

The Immaculate Conception should not be confused with the Virginity of Mary or the Virgin birth of Jesus; it refers to the conception of Mary by her mother, Saint Anne. Although the belief was widely held since at least Late Antiquity, the doctrine was not formally proclaimed until December 8, 1854, by Pope Pius IX in his papal bull Ineffabilis Deus. It is not formal doctrine except in the Roman Catholic Church. The Feast of the Immaculate Conception is observed on December 8 in many countries as a Holy Day of Obligation and in some places as a national or public holiday.

The defined dogma of the Immaculate Conception regards original sin only, saying that Mary was preserved from any stain (in Latin, macula or labes, the second of these two synonymous words being the one used in the formal definition). The proclaimed Roman Catholic dogma states "that the most Blessed Virgin Mary, in the first instance of her conception, by a singular grace and privilege granted by Almighty God, in view of the merits of Jesus Christ, the Saviour of the human race, was preserved free from all stain of original sin." Therefore, being always free from original sin, the doctine teaches that from her conception Mary received the sanctifying grace that would normally come with baptism after birth.

Mother Mary Angelica of the Annunciation, PCPA (born Rita Antoinette Rizzo on April 20, 1923) is an American Roman Catholic nun who founded the Eternal Word Television Network. In 1944 she entered the Poor Clares of Perpetual Adoration, a Franciscan religious order for women, as a postulant, and a year later she was admitted to the order as a novice. She went on to found a new house for the order in 1962 in Irondale, Alabama, where the EWTN is headquartered, and in 1996 she initiated the building of the Shrine of the Most Blessed Sacrament and Our Lady of the Angels monastery in Hanceville, Alabama. Mother Angelica hosted shows on EWTN until she suffered a stroke in 2001. She continues to reside at the monastery in Hanceville.

The future Mother Angelica was born Rita Antoinette Rizzo, on April 20, 1923, in Canton, Ohio. She was the only child of John and Mae Helen Rizzo (née Gianfrancesco). Her father abandoned the family when Rita was very young, and her parents divorced in 1929. Her mother maintained full custody of Rita, but struggled with chronic depression and poverty. Her maternal grandparents kept Rita at times.