In Cathedra S. Petri Apostoli Antiochiæ ~ Duplex majus

Commemoratio: In Vigilia S. Matthiæ Ap.

Sat, 2/22/25:

Today is the feast of the Chair of St. Peter, Ap, at Antioch under the 1954 (double major) rubrics. In 1961, this feast was merged with the January 18 feast of St. Peter's Chair at Rome and retitled simply the feast of the Chair of St. Peter, Ap (raised to the II class).

Mass: Proper Mass (under 1954, as on January 18). White. Gloria. Gradual/Tract. Credo. Preface of the Apostles. Ite. Commemoration of St. Paul, Ap (under 1962, under one conclusion) and of the anticipated vigil of St. Matthias, Ap (1954 only; suppressed in 1955). Under 1954, Last Gospel of the vigil.

Under 1954, in parish churches, the Mass of the anticipated vigil of St. Matthias may be offered at private (low) Masses, either in place of the Mass of the feast (if only one Mass is offered) or as a second Mass. Mass Ego autem for the vigil of an apostle. Violet. Omit Gloria. Gradual. Omit Tract. Omit Credo. Common Preface. Benedicamus. Commemoration of the Chair of St. Peter at Antioch and of St. Paul.

In cathedral churches, monasteries, etc., under 1954, the Mass of the feast of St. Peter's Chair is sung after Terce as above, with commemoration of St. Paul and omitting commemoration of the vigil. The Mass of the vigil is sung after None as above, omitting commemoration of St. Peter and of St. Paul and with the orations Concede nos of Our Lady and either Ecclesiae tuae for the Church or Deus omnium for the pope.

Office: Under 1954, festal office. White. Matins of 3 nocturns of 9 lessons (1st nocturn = Petrus Apostolus with proper responsories, lesson IX of the vigil). Proper psalms and antiphons at Matins. Te Deum. At Lauds and the hours, psalms of Sunday (Lauds = schema I) with proper antiphons. All else from the proper. Proper Benedictus antiphon. Collect of the feast. Commemoration of St. Paul (proper Benedictus antiphon) and of the vigil of St. Matthias at Lauds. Omit suffrage. At Prime, psalms 53, 118.1, 118.2.

(Source: LB236 on Twitter/X.)

From the Sermons of St. Augustine, Bishop of Hippo.
16th on the Saints
The solemn Feast of today received from our forefathers the name of that of St Peter's Chair at Antioch, because there is a tradition that it was on this day that Peter, first of the Apostles, was enthroned in a Bishop's Chair. Rightly, therefore, do the Churches observe the first day of that Chair, the right to which the Apostle received for the salvation of the Churches from the Lord of the Churches Himself, with the words: Thou art Peter, and upon this rock I will build My Church.

Collect
℣. The Lord be with you.
℟. And with thy spirit.
Let us pray.
O God, Who when giving blessed Peter, Your Apostle, the keys of the heavenly kingdom, bestowed on him the power of binding and loosing, grant that by the help of his intercession we may be delivered from the bonds of our sins.
Through Jesus Christ, thy Son our Lord, Who liveth and reigneth with thee, in the unity of the Holy Ghost, God, world without end.
℟. Amen.

Commemoration of St. Paul
O God, Who taught vast numbers of the Gentiles by the preaching of the blessed Apostle Paul, grant, we beseech You, that by honoring his memory, we may enjoy the benefit of his patronal intercession with You.
Commemoration Vigil of St. Matthias, Apostle
Grant, we beseech thee, O Almighty God, that the worshipful Feast of thy blessed Apostle, Matthias on the eve whereof we now stand, may avail us to the increase both of godliness toward thee, and of health to our own souls.
Through Jesus Christ, thy Son our Lord, Who liveth and reigneth with thee, in the unity of the Holy Ghost, God, world without end.
℟. Amen.