The Roman Missal: Proper of Saints, November 29 to January 31 (English) 5
1[December 4. St Peter Chrysologus, B. C.—Double.]
2[Mass.—In medio Ecclesiæ, as in the Common of Doctors, page xxxii, except what follows:]
3Prayer. Deus qui beatum. O God, who wert pleased to choose the illustrious doctor, blessed Peter, by a divine direction to govern and instruct thy Church; grant, we beseech thee, that we may have him for our intercessor in heaven, whom we had for our teacher on earth. Through our Lord, &c.
4[Then is made a commemoration of the Feria, and afterwards of St Barbara, by the prayer Deus qui inter cetera, as in the Mass Loquebar, of a Virgin and Martyr, page xlii. with its Secret and Postcommunion.]