Nuncio is an ecclesiastical diplomatic title, derived from the ancient Latin word, Nuntius, meaning "envoy." This article addresses this title as well as derived similar titles, all within the structure of the Roman Catholic Church. A Papal Nuncio is the equivalent of Ambassadors of other countries, although in Catholic countries, the nuncio often ranks above Ambassadors in diplomatic protocol.

A Papal Nuncio (officially known as an Apostolic Nuncio) is a permanent diplomatic representative (head of diplomatic mission) of the Holy See to a state or international organization (e.g., the Arab League), having the rank of an ambassador extraordinary and plenipotentiary, usually with the ecclesiastical rank of titular archbishop. Under the 1961 Vienna Convention on Diplomatic Relations, a papal nuncio is an ambassador like those from any other country. However, the Vienna Convention allows the receiving state to grant seniority of precedence to the papal nuncio over others of ambassadorial rank accredited to the same country, and may grant the deanship of that country's diplomatic corps to the nuncio regardless of seniority.

Shane Claiborne (born July 11, 1975) is one of the founding members of The Simple Way in Philadelphia, Pennsylvania. This community was featured on the cover of Christianity Today as a pioneer in the New Monasticism movement. Claiborne is also a prominent activist for nonviolence and service to the poor.

Claiborne grew up in east Tennessee. His dad, who was a Vietnam War veteran, died when Shane was 9 years old. A graduate of Eastern University, where he studied sociology and youth ministry, Claiborne did his final academic work for Eastern University at Wheaton College in Illinois. While at Wheaton, Claiborne did an internship at Willow Creek Community Church. He has done some graduate work at Princeton Theological Seminary, but took a leave of absence, and now is a part of The Alternative Seminary in Philadelphia.

Claiborne's outlook on ministry to the poor is often compared to Mother Teresa,^{[citation needed]} whom he worked alongside during a 10-week term in Calcutta. He spent 3 weeks in Baghdad with the Iraq Peace Team (a project of Voices in the Wilderness and Christian Peacemaker Teams). He was witness to the military bombardment of Baghdad as well as the militarized areas between Baghdad and Amman. As a member of IPT, Claiborne took daily trips to sites where there had been bombings, visited hospitals and families, and attended worship services during the war. He also continues to serve as a board member for the nation-wide Christian Community Development Association which was founded by the authors and community developers, John Perkins and Wayne Gordon.

Brian Bóruma mac Cennétig, (c. 941–23 April 1014), (English: Brian Boru, Middle Irish: Brian Bóruma, Irish: Brian Bóroimhe), was an Irish king who ended the domination of the High Kingship of Ireland by the Uí Néill. Building on the achievements of his father, Cennétig mac Lorcain, and especially his elder brother, Mathgamain, Brian first made himself King of Munster, then subjugated Leinster, making himself ruler of the south of Ireland. He is the founder of the O'Brien dynasty.

The Uí Néill king Máel Sechnaill mac Domnaill, abandoned by his northern kinsmen of the Cenél nEógain and Cenél Conaill, acknowledged Brian as High King at Athlone in 1002. In the decade that followed, Brian campaigned against the northern Uí Néill, who refused to accept his claims, against Leinster, where resistance was frequent, and against the Norse Gaelic Kingdom of Dublin. Brian's hard-won authority was seriously challenged in 1013 when his ally Máel Sechnaill was attacked by the Cenél nEógain king Flaithbertach Ua Néill, with the Ulstermen as his allies. This was followed by further attacks on Máel Sechnaill by the Dubliners under their king Sihtric Silkbeard and the Leinstermen led by Máel Mórda mac Murchada. Brian campaigned against these enemies in 1013. In 1014, Brian's armies confronted the armies of Leinster and Dublin at Clontarf near Dublin on Good Friday. The resulting Battle of Clontarf was a bloody affair, with Brian, his son Murchad, and Máel Mórda among those killed. The list of the noble dead in the Annals of Ulster includes Irish kings, Norse Gaels, Scotsmen, and Scandinavians. The immediate beneficiary of the slaughter was Máel Sechnaill who resumed his interrupted reign.

Charles John Brown (born 13 October 1959) is the current nuncio to Ireland since his appointment by Pope Benedict XVI on 26 November 2011. He had previously served as an official at the Congregation for the Doctrine of the Faith.

His mother’s maiden name was Patricia Murphy and one great grandparent was called O’Callaghan, but Archbishop Brown has had little contact with Ireland. The Brown surname an anglicization of German Braun.

Brown made ​​the following academic studies: BA (History), University of Notre Dame, MA (Theology), University of Oxford (England), MA (Medieval Studies), University of Toronto, M. Div., Saint Joseph's Seminary, Yonkers (USA), STD (Sacramental Theology), Pontifical University St. Anselmo, Rome.

His only experience of Ireland came via two short holidays in the early 1980s when, while studying theology at Oxford, he took the boat to Dublin to visit a US friend and his Irish girlfriend for Christmas.

He was ordained a priest for the Archdiocese of New York by Cardinal John Joseph O'Connor on 13 May 1989 in St. Patrick's Cathedral, New York. From 1989 to 1991 he was assistant priest at St. Brendan's Parish in the Bronx, New York City. From 1994 to his appointment as nuncio, he worked as an official of the Congregation for the Doctrine of the Faith. He became a Chaplain of His Holiness on 6 May 2000. He was appointed Adjunct Secretary of the International Theological Commission in September 2009.