Topic summary
Traditionis custodes

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Traditionis custodes (Guardians of the Tradition) is an apostolic letter issued motu proprio by Pope Francis, promulgated on 16 July 2021 regarding the continued use of pre-Vatican II rites. It restricts the celebration of the Tridentine Mass of the Roman Rite, sometimes colloquially called the "Latin Mass" or the "Traditional Latin Mass". The apostolic letter was accompanied by an ecclesiastical letter to the Catholic bishops of the world.
The Congregation for Divine Worship has stated in an official instruction (responsa) that the Latin version of Traditionis custodes "is the official text to be referenced".