Internuncio

noun

1. A Vatican diplomatic envoy or representative ranking just beneath a nuncio. No longer in use.
2. An official representative or ambassador of the papacy at a minor court, in distinction from a nuncio, who is its representative at a more important court.
3. Hence A messenger between two parties.
4. A messenger between two parties.
5. A representative, or chargé d'affaires, of the pope at a foreign court or seat of government, ranking next below a nuncio.