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.
Pope John Paul II
On 25 January 1983, with the Apostolic Constitution "Sacrae disciplinae leges" John Paul II promulgated the current Code of Canon Law for all members of the Catholic Church who belonged to the Latin Church. It entered into force the first Sunday of the following Advent, which was 27 November 1983. John Paul II described the new Code as "the last document of Vatican II". Edward N. Peters has referred to the 1983 Code as the "Johanno-Pauline Code" ("Johannes Paulus" is Latin for "John Paul"), paralleling the "Pio-Benedictine" 1917 code that it replaced.