Depending on the level, it could be an internuncio (lowest), a papal nuncio or a legate. In addition, there are variuos levels of nuncio and legate.
internuncio (a diplomatic representative of the Pope ranking below a nuncio)
A papal nuncio.
internuncio
An internuncio is a papal envoy or messenger but ranks below a nuncio, or ambassador.
A Nuncio is an ambassador for the Vatican.
Nuncio
Papal Nuncio
An Ambassador's office is called an Embassy.
Ambassador
An ambassador.
Ambassador.
ambassador
Yes! 'The Call' was written by Jessie Pope. WW1 1915
Which Pope Urban? There are several.
An Ambassador.