Gibraltar-Vatican Joint Issue
The Vatican City State issued its first stamps in 1929, the same year that it was established under the Lateran Treaties. It released its first joint issue in 1969. Joint issues of stamps by the Vatican and other countries were uncommon for most of the twentieth century. In 2000, the Vatican and Poland released a joint issue designed by Czeslaw Slania which commemorated the eightieth birthday of John Paul II. However, the early twenty-first century saw a substantial increase in joint issues. In 2003, a set released by the Vatican and Poland celebrated the twenty-fifth anniversary of John Paul II's pontificate. The following year, a joint issue of the same countries commemorated the pope's return visits to Poland. In 2005, five of the eleven stamp sets released by the Vatican were joint issues. There have also been joint issues with Germany since Benedict XVI became Pope. In 2011, the Vatican and Croatia released a joint issue which commemorated the tercentenary of the birth of Rugerius Boscovich (1711 – 1787).
World Council of Churches
Pope St. John XXIII took a different stance however, and in 1958 he was elected as the head of the Catholic Church. Ecumenism was a new element of catholic ideology which had been permitted, which was signified to a great extent, when John XXIII met with the then Archbishop of Canterbury, Geoffrey Fisher. This was the first meeting between an Archbishop of Canterbury, and the Pope in the Vatican for 600 years. John XXIII later developed the office of the Secretariat for Promoting Christian Unity; which symbolised a dramatic shift in support for the ecumenical movement, from the Catholic Church, led from the Vatican. 1961 saw Catholic members attend the Delhi conference of the WCC, which masked a significant shift in attitude toward the WCC from the Papacy. There was the idea in addition to this, that the Pope invited non-Catholics to attend the Vatican II council. This new approach to inter-denominational relations was marked within the Unitatis Redintegratino.