Preconciliar rites after the Second Vatican Council

In the Catholic Church, preconciliar Latin liturgical rites ("preconciliar": before the Second Vatican Council, which began in 1962) coexist with postconciliar rites. In the years following the Second Vatican Council, Pope Paul VI initiated significant changes to Catholic liturgical practices.

Source: Wikipedia — Preconciliar rites after the Second Vatican Council (CC BY-SA 4.0)