nunciature

noun3

1. •
   The status or rank of a nuncio (diplomatic representative of the Roman Catholic Church).
2. •
   The building and staff of a nuncio; the equivalent of an embassy for the Holy See.

   • His ecclesiastical appointments showed how rapidly he had made his way, how supple was his mind: first of all secretary to the nunciature at Lisbon; […]. — 1896
3. •
   The term of service of a nuncio.