Mass is the central act of worship in the Catholic Church.  Many of the Catholic Church's other sacraments are celebrated in the framework of the service (i.e. Communion). The term Mass often colloquially refers to the entire church service in general[1].

  • The Pre-Tridentine Mass refers to the variants of the liturgical rite of Mass in Rome before 1570, when the Roman Missal was obligatory throughout the Latin-Rite or Western Church.
  • The Tridentine Mass refers to the Roman Rite Mass contained in the Roman Missal that were published from 1570 to 1962.  It was in response to a decision of the Council of Trent, making it mandatory throughout the Western Church and, mostly, celebrated exclusively in Latin.
    • Psalm 42, known by its opening words, Iudica me, is recited at the foot of the altar in call and response between the priest and congregation.
  • The Mass of Paul VI refers to the current ordinary or normal form of the Roman Rite Mass, promulgated by Pope Paul VI in 1969 after the Second Vatican Council.

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  1. Wikipedia: Mass