An episcopal conference, sometimes called a conference of bishops, is an official assembly of the bishops of the Catholic Church in a given territory. Episcopal conferences have long existed as informal entities. The first assembly of bishops to meet regularly, with its own legal structure and ecclesial leadership function, is the Swiss Bishops' Conference, which was founded in 1863. More than forty episcopal conferences existed before the Second Vatican Council. Their status was confirmed by the Second Vatican Council and further defined by Pope Paul VI's 1966 motu proprio, Ecclesiae sanctae.

The magisterium of the Catholic Church is the church's authority or office to give authentic interpretation of the word of God, "whether in its written form or in the form of Tradition". According to the 1992 Catechism of the Catholic Church, the task of interpretation is vested uniquely in the Pope and the bishops, though the concept has a complex history of development. Scripture and Tradition "make up a single sacred deposit of the Word of God, which is entrusted to the Church", and the magisterium is not independent of this, since "all that it proposes for belief as being divinely revealed is derived from this single deposit of faith".