Tridentine Mass

The Tridentine Mass, also known as the Extraordinary Form of the Roman Rite, the usus antiquior, the Vetus Ordo, the Traditional Latin Mass (TLM), or the Traditional Rite, is the form of Mass found in the Roman Missal of the Catholic Church codified in 1570 and published thereafter with amendments up to 1962. Celebrated almost exclusively in Ecclesiastical Latin, it was the most widely used Eucharistic liturgy in the world from its issuance in 1570 until its replacement by the Mass of Paul VI promulgated in 1969.