High Quality Content by WIKIPEDIA articles! The term Pre-Tridentine Mass here refers to the variants of the liturgical rite of Mass in Rome before 1570, when, with his bull Quo primum, Pope Pius V made the Roman Missal, as revised by him, obligatory throughout the Latin-Rite or Western Church, except for those places and congregations whose distinct rites could demonstrate an antiquity of 200 years or more.