other religions in the 2000 document Dominus Iesus which also talks about the Catholic way to engage in "ecumenical dialogue". During his time at Tübingen University, Ratzinger published articles in the reformist theological journal Concilium, though he increasingly chose less reformist themes than other contributors to the magazine such as Küng and Schillebeeckx. In 1969, Ratzinger returned to Bavaria, to the University of Regensburg and co-founded the theological journal Communio, with Hans Urs von Balthasar, Henri de Lubac, Walter Kasper, and others, in 1972. Communio, now published in seventeen languages, including German, English, and Spanish, has become a prominent journal of contemporary Catholic theological thought. Until he was elected pope, he remained one of the journal's most prolific contributors. In 1976, he suggested that the Augsburg Confession might be recognised as a Catholic statement of faith. Several of Benedict's former students became his confidantes, notably Christoph Schönborn, and a number of his former students sometimes meet for discussions. He served as vice-president of the University of Regensburg from 1976 to 1977. On 26 May 1976, he was appointed a Prelate of Honour of His Holiness. Archbishop of Munich and Freising: 1977–1982 On 24 March 1977, Ratzinger was appointed Archbishop of Munich and Freising, and was ordained a bishop on 28 May. He took as his episcopal motto (Latin for 'cooperators of the truth'), from the Third Epistle of John, a choice on which he commented in his autobiographical work Milestones. In the consistory of 27 June 1977, he was named Cardinal Priest of Santa Maria Consolatrice al Tiburtino by Pope Paul VI. By the time of the 2005 conclave, he was one of only fourteen remaining cardinals appointed by Paul VI, and one of only three of those under the age of 80. Of these, only he and William Wakefield Baum took part in the conclave. Prefect of the Congregation for the Doctrine of the Faith: 1981–2005 On 25 November 1981, Pope John Paul II, upon the retirement of Franjo Šeper, named Ratzinger as the Prefect of the Sacred Congregation for the Doctrine of the Faith, formerly known as the "Sacred Congregation of the Holy Office", the historical Roman Inquisition. Consequently, he resigned from his post in Munich in early 1982. He was promoted within the College of Cardinals to become Cardinal Bishop of Velletri-Segni in 1993 and was made the college's vice-dean in 1998 and dean in 2002. Just