This is the Mass of the Roman rite which has been celebrated throughout the world up until 1969. The Traditional Latin Mass is sometimes (although mistakenly) referred to as the Tridentine Mass, because the Roman Missal was codified by Pope Saint Pius V, at the specific request of the Fathers of the Council of Trent in the sixteenth century (the adjective 'Tridentine' is derived from the name Trent). It is important to recall, however, that what Pius V published in 1570 was a Missal based upon the continuous liturgical practice of the Church since the time of Pope Saint Gregory the Great in the sixth century.
The Traditional Latin Mass has sustained the Western Church for the last 1,500 years.
It is this Mass which has inspired all the great saints and martyrs of the Church and nourished the faith of countless generations of the faithful. It is the Mass that was taken by missionaries all over the world in order to win souls for Christ.
The Traditional Latin Mass is also called the Mass of the Roman Rite. After the Council of Trent Pope Saint Pius V issued the Bull Quo Primum Tempore (1570) which promulgated the Roman Mass now codified for the first time in the Church's history. The Bull also guaranteed use of the Roman Rite in perpetuity, and confirmed the traditional rites of various religious orders (such as the Dominicans) where these had been in use for at least 200 years.