A Novena to the Immaculate Conception

The angel's greeting to Mary in Luke 1:28, usually translated full of grace, renders a single Greek participle, kecharitomene, a perfect passive form suggesting a grace already completed rather than newly given; the doctrine of the Immaculate Conception reads that grammatical detail as pointing to a favor granted from the first moment of her existence.

The Immaculate Conception is frequently confused with the virgin birth of Christ, a separate doctrine concerning Jesus's own conception; the Immaculate Conception instead concerns Mary's own conception by her parents, traditionally named Joachim and Anne, and is kept on 8 December, nine months before her nativity on 8 September.

The Franciscan theologian John Duns Scotus, who died in 1308, answered the medieval objection that preserving Mary from sin would place her outside the reach of Christ's redemption, arguing that to be preserved from ever falling is a more perfect form of redemption than being freed after falling; his argument became the standard theological basis for the later dogma.

The Council of Trent, in its 1546 decree on original sin, included a formal declaration that its decree was not intended to include the Blessed Virgin Mary, three centuries before the doctrine of the Immaculate Conception was formally defined.

The feast long predates its 1854 dogma: a Feast of the Conception of St. Anne was kept in the Eastern Church by at least the eighth century, and the observance reached England and then Rome by the twelfth century, seven hundred years before the doctrine received a formal definition.

Four years after Pope Pius IX defined the dogma in 1854, an illiterate fourteen-year-old named Bernadette Soubirous reported that a lady who appeared to her at Lourdes identified herself, in the local dialect, as the Immaculate Conception, a title Bernadette said she did not understand and repeated to her parish priest without knowing what it meant.

Pope Pius IX defined the dogma in the apostolic constitution Ineffabilis Deus, issued on 8 December 1854, declaring that Mary, in the first instance of her conception, by a singular grace and privilege of almighty God, was preserved free from all stain of original sin.

Pius IX proclaimed the dogma in a ceremony in St. Peter's Basilica attended by over a hundred bishops summoned to Rome for the occasion, one of the first instances of a pope consulting the world's bishops so broadly before defining a doctrine, a practice later formalized at the First Vatican Council.

The antiphon Tota pulchra es draws its opening words from the Song of Songs 4:7, thou art all fair, my love, and there is no spot in thee, a medieval application of love poetry to Mary that became standard in the liturgy of her Marian feasts.