Clement XI – Commissi Nobis (1708): The Feast of the Immaculate Made Obligatory throughout the Church (Doctrina Pontificia IV, n. 204)
The Bull Commissi Nobis (December 6, 1708) of Clement XI is one of the most important Mariological decisions of the papacy before Pius IX. By making the feast of the Immaculate Conception (December 8) obligatory throughout the universal Church, the pope takes a decisive step on the path that will lead to the dogmatic definition of 1854.
| Collection | Doctrina Pontificia IV: Documentos Marianos, n. 204 |
| Pope | Clement XI (1700-1721) |
| Document | Bull Commissi Nobis, December 6, 1708 |
| Topic | Feast of December 8 obligatory throughout the universal Church |
Context: The Question of Obligation
Before 1708, the feast of the Immaculate Conception on December 8 was celebrated in many places, but it was not universally obligatory as a holy day of obligation for all Catholics. There were dioceses where it was an optional feast, others where it was obligatory by local decision. Clement XI unifies the practice: December 8 becomes a holy day of obligation for the whole universal Church.
Key Text of the Bull
“Festum Immaculatae Conceptionis Beatissimae Virginis Mariae ab universis Christifidelibus… in posterum tanquam festum de praecepto observandum esse, declaramus, decernimus et mandamus; ita ut in eo Christifideles universi, sub peccati mortalis reatu, ab operibus servilibus abstineant, Missaeque sacrificio intersint”
We declare, decree, and command that the Feast of the Immaculate Conception of the Most Blessed Virgin Mary is to be observed by all the faithful of Christ… in the future as a holy day of obligation; in such a way that on it all the faithful of Christ, under pain of mortal sin, abstain from servile works and attend the sacrifice of the Mass.
Theological and Juridical Significance
By making the feast de praecepto (of obligation), Clement XI is implicitly affirming that the Immaculate Conception is a matter of faith sufficiently certain to be the object of an obligatory universal celebration. It is not yet the dogmatic definition, but it is the liturgical equivalent: the whole Church celebrates as faith what is not yet defined as dogma. This is the last step before Sixtus IV (1483), Alexander VII (1661), and Pius IX (1854) complete the process.
The Date: December 6
Significantly, the Bull is dated December 6, the eve of Saint Ambrose and two days before the feast of the Immaculate. Clement XI wanted the document to arrive in time to be read and applied at the coming feast of December 8, 1708.
Liturgical Legacy
The decision of Clement XI has endured to this day: December 8 is still a holy day of obligation for Catholics. The Commissi Nobis of 1708 is therefore the document that fixed the Marian liturgical calendar that all Catholics live by today.
Further reading
Explore Mariology, the Ineffabilis Deus (Pius IX, 1854), the post on Clement IX to XI, and the Postgraduate Program in Mariology.
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