Apostolic nunciature

An apostolic nunciature (Latin: Nuntiatura Apostolica) is the highest-level diplomatic mission of the Holy See and functions in a manner similar to an embassy. Unlike embassies, however, apostolic nunciatures do not issue visas and do not maintain consulates.

The head of an apostolic nunciature is the apostolic nuncio, commonly referred to as a papal nuncio. A nuncio is the Holy See’s permanent diplomatic representative to a state or to certain international intergovernmental organizations, notably the European Union and ASEAN. Nuncios hold the rank of ambassador extraordinary and plenipotentiary and, in ecclesiastical terms, are usually titular archbishops. Papal envoys to other international organizations who do not serve as heads of mission are typically designated as "permanent observers" or "delegates".

In a number of countries with diplomatic relations with the Holy See, the apostolic nuncio serves ex officio as the doyen of the diplomatic corps. In these states, the nuncio holds the highest precedence among accredited diplomats and may speak on behalf of the diplomatic corps on matters of protocol and diplomatic privilege. While this arrangement is common in countries with a Catholic heritage, it is also recognized in some countries that are not predominantly Catholic.

Beyond diplomatic duties, an apostolic nuncio acts as the official liaison between the Holy See and the local Catholic Church. Among other responsibilities, the nuncio plays a significant role in the process of selecting bishops within the country.