Second Vatican Council
The Second Ecumenical Council of the Vatican, commonly known as the or , addressed relations between the Catholic Church and the modern world. The council, through the Holy See, was formally opened under the pontificate of Pope John XXIII on 11 October 1962 and was closed under Pope Paul VI on the Solemnity of the Immaculate Conception on 8 December 1965.
Catechism of the Catholic Church
The decision to publish a catechism was taken at the Second Extraordinary General Assembly of the Synod of Bishops that was convened by Pope John Paul II on 25 January 1985 for the 20th anniversary of the close of the Second Vatican Council, and in 1986, put a commission composed of 12 bishops and cardinals in charge of the project. The commission was assisted by a committee consisting of seven diocesan bishops, experts in theology and catechesis.