The seven new optional prefaces, three of which are ancient and four adapted from similar prefaces in the new missal (Novus Ordo), were promulgated by the Decree Quo Magis, published on March 25, 2020.
It is relevant to recall that new optional prefaces for the 1962 Missal had been foreseen by Pope Benedict XVI on the accompanying Letter to Summorum Pontificum, published on the same day as the motu proprio, July 7, 2007: "new Saints and some of the new Prefaces can and should be inserted in the old Missal." (Benedict XVI)
It is relevant to recall that new optional prefaces for the 1962 Missal had been foreseen by Pope Benedict XVI on the accompanying Letter to Summorum Pontificum, published on the same day as the motu proprio, July 7, 2007: "new Saints and some of the new Prefaces can and should be inserted in the old Missal." (Benedict XVI)
The Seven optional Prefaces are the following: Preface of the Angels (feasts and votive masses of the Angels and Dedication of St. Michael the Archangel - Sep. 29); Preface of Saint John the Baptist (on the festive and votive masses of the saint); Preface of Martyrs (on the festive and votive masses of Martyrs, other than St. John the Baptist); Preface of All Saints and of Patron Saints (not covered by other prefaces); Preface of the Most Blessed Sacrament (for Corpus Christi, for votive masses of the Blessed Sacrament, and for votive masses of O.L. Jesus Christ, Eternal High Priest); Preface for the Dedication of a Church; Preface for Nuptial Masses (for nuptial masses "Pro sponsis").
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