Internuntius
Internuntius (from Latin ) was a papal envoy of the second rank in states in which no nuncio is needed due to lack of procedures .
The Austrian ambassador to Constantinople was also called Internuntius earlier , since Austria had only concluded an armistice (Treaty of Constantinople) with the Ottoman Empire in 1533 and therefore only had a temporary representative .
The term is no longer used today.
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Wiktionary: Internuntius - explanations of meanings, word origins, synonyms, translations