Latin remains the official language of the Holy See and the Roman Rite of the Catholic Church. Until the 1960s and still later in Roman colleges like the Gregorian, Catholic priests studied theology using Latin textbooks and the language of instruction in many seminaries was also Latin, which was seen as the language of the Church Fathers. The use of Latin in pedagogy and in theological research, however, has since declined. Nevertheless, canon law requires for seminary formation to provide for a thorough training in Latin, though "the use of Latin in seminaries and pontifical universities has now dwindled to the point of extinction." Latin was still spoken in recent international gatherings of Catholic leaders, such as the Second Vatican Council, and it is still used at conclaves to elect a new Pope. The Tenth Ordinary General Assembly of the Synod of Bishops in 2004 was the most recent to have a Latin-language group for discussions.