Eamon Duffy (born 9 February 1947, Dundalk) is an Irish Professor of the History of Christianity at the University of Cambridge, and former President of Magdalene College.

He describes himself as a "cradle Catholic" and specializes in 15th to 17th century religious history of Britain. He is also a member of the Pontifical Historical Commission. His work has done much to overturn the popular image of late-medieval Catholicism in England as moribund, and instead presents it as a vibrant cultural force. On weekdays from 22 October to 2 November 2007, he presented the BBC Radio 4 series 10 Popes Who Shook the World - those popes featured were Peter, Leo I, Gregory I, Gregory VII, Innocent III, Paul III, Pius IX, Pius XII, John XXIII, and John Paul II.

Professor Duffy is a fellow and former president of Magdalene College, Cambridge.

Benedict XVI (Latin: Benedictus PP. XVI; Italian: Benedetto XVI; German: Benedikt XVI.; born Joseph Aloisius Ratzinger on 16 April 1927) is the 265th Pope, a position in which he serves dual roles as Sovereign of the Vatican City State and leader of the Catholic Church. As pope he is regarded as the successor of Saint Peter. Benedict XVI was elected on 19 April 2005 in a papal conclave, celebrated his Papal Inauguration Mass on 24 April 2005, and took possession of his cathedral, the Archbasilica of St. John Lateran, on 7 May 2005. A native of Bavaria, Pope Benedict XVI has both German and Vatican citizenship.

After a long career as an academic, serving as a professor of theology at various German universities—the last being the University of Regensburg—he was appointed Archbishop of Munich and Freising and cardinal by Pope Paul VI in 1977. In 1981, he settled in Rome when he became Prefect of the Congregation for the Doctrine of the Faith, one of the most important dicasteries of the Roman Curia. From 2002 until his election as Pope, he was also Dean of the College of Cardinals, and as such the primus inter pares among the cardinals. Prior to becoming Pope, he was "a major figure on the Vatican stage for a quarter of a century" as "one of the most respected, influential and controversial members of the College of Cardinals"; he had an influence "second to none when it came to setting church priorities and directions" as one of Pope John Paul II's closest confidants.