Augustin Cardinal Bea was a Cardinal in the Roman Catholic Church and the first President of the Vatican's Secretariat for Promoting Christian Unity, founded by Pope John XXIII. The name was changed to the Pontifical Council for Promoting Christian Unity by Pope John Paul II on 28 June 1988 in the Apostolic Constitution. The word cardinal comes from the Latin cardo for hinge and usually refers to things of fundamental importance, as in cardinal rule or cardinal sins. ... The Roman Catholic Church (commonly known as the Catholic Church) is the Christian Church which is led by the Pope, the Bishop of Rome, currently Pope Benedict XVI. The Roman Catholic Church teaches that it is the one holy catholic and apostolic Church founded by Jesus Christ. ... President is a title held by many leaders of organizations, companies, universities, and countries. ... Pope John XXIII (Latin: ), born Angelo Giuseppe Roncalli (November 25, 1881 – June 3, 1963), reigned as the 261st Pope of the Catholic Church and sovereign of Vatican City from October 28, 1958 until his death in 1963. ... The Pontifical Council for Promoting Christian Unity origins are associated with the Second Vatican Council. ... Pope John Paul II (Latin: ), born Karol Józef Wojtyła (May 18, 1920 – April 2, 2005) reigned as pope of the Roman Catholic Church for almost 27 years, from October 16, 1978 until his death, making his the second-longest pontificate. ... An Apostolic constitution (Latin constitutio apostolica) is a very solemn decree issued by the Pope of the Roman Catholic Church. ...