Doyen

In the United States and other English-speaking countries, the title of Dean is often used for the seniormost member of the diplomatic corps.

[3] In many Catholic countries, the doyen of the diplomatic corps is the Apostolic Nuncio regardless of the length of service.

In New Zealand, for example, the doyen takes precedence over figures such as the deputy prime minister and former governors-general.

[6] In many countries that have Catholicism as the official or dominant religion, the apostolic nuncio (the diplomatic representative of the Holy See) serves as doyen by virtue of his office, regardless of seniority;[7] in other cases, the nuncio is treated as an ordinary ambassador of the Holy See and has no special precedence.

[8] The diplomatic corps may also cooperate amongst itself on a number of matters, including certain dealings with the host government.

The Apostolic Nuncio Ivo Scapolo , as Doyen, is the single member of the diplomatic corps in attendance at the second inauguration of Marcelo Rebelo de Sousa , President of Portugal , held in March 2021 during the COVID-19 pandemic