page_title: Tridentine Mass
section_title: Historical variations
hierarchical_section_title: Tridentine Mass / Historical variations
caption_attribution_description: English: Missale Romanum Glagolitice, the first Croatian printed book.
context_page_description: The Tridentine Mass, also known as the Traditional Latin Mass or Usus Antiquior, is the Roman Rite Mass of the Catholic Church. It appears in typical editions of the Roman Missal published from 1570 to 1962. Celebrated exclusively in Ecclesiastical Latin, it was the most widely used Eucharistic liturgy in the world from its issuance in 1570 until the introduction of the Mass of Paul VI.
  The edition promulgated by Pope John XXIII in 1962 and Mass celebrated in accordance with it are described in the 2007 motu proprio Summorum Pontificum as an authorized form of the Church's liturgy, and this form of the Tridentine Mass is often spoken of as the Extraordinary Form of the Roman Rite.
  "Tridentine" is derived from the Latin Tridentinus, "related to the city of Tridentum", where the Council of Trent was held at the height of the Counter-Reformation. In response to a decision of that council, Pope Pius V promulgated the 1570 Roman Missal, making it mandatory throughout the Latin Church, except in places and religious orders with missals from before 1370.
context_section_description: In the Apostolic Constitution (papal bull) Quo primum, with which he prescribed use of his 1570 edition of the Roman Missal, Pius V decreed: "We order and enjoin that nothing must be added to Our recently published Missal, nothing omitted from it, nor anything whatsoever be changed within it." This of course did not exclude changes by a Pope, and Pope Pius V himself added to the Missal the feast of Our Lady of Victory, to celebrate the victory of Lepanto of 7 October 1571. His immediate successor, Pope Gregory XIII, changed the name of this feast to "The Most Holy Rosary of the Blessed Virgin Mary" and Pope John XXIII changed it to "Our Lady of the Rosary".
  Pius V's work in severely reducing the number of feasts in the Roman Calendar (see this comparison) was very soon further undone by his successors. Feasts that he had abolished, such as those of the Presentation of Mary, Saint Anne and Saint Anthony of Padua, were restored even before Clement VIII's 1604 typical edition of the Missal was issued.
  In the course of the following centuries new feasts were repeatedly added and the ranks of certain feasts were raised or lowered. A comparison between Pope Pius V's Tridentine Calendar and the General Roman Calendar of 1954 shows the changes made from 1570 to 1954. Pope Pius XII made a general revision in 1955, and Pope John XXIII made further general revisions in 1960 simplifying the terminology concerning the ranking of liturgical celebrations.
  While keeping on 8 December what he called the feast of "the Conception of Blessed Mary" (omitting the word "Immaculate"), Pius V suppressed the existing special Mass for the feast, directing that the Mass for the Nativity of Mary (with the word "Nativity" replaced by "Conception") be used instead. Part of that earlier Mass was revived in the Mass that Pope Pius IX ordered to be used on the feast.
caption: Missale Romanum in Croatian Glagolitic script printed in 1483
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