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 text was approved by John Paul II on 25 June 1992, and promulgated by him on 11 October 1992, the 30th anniversary of the opening of the Second Vatican Council, with his apostolic constitution, "Fidei depositum". Cardinal Georges Cottier, Theologian emeritus of the Pontifical Household and later cardinal deacon of "Santi Domenico e Sisto", of the University Church of the Pontifical University of Saint Thomas Aquinas, "Angelicum" was influential in drafting the encyclical.