legate

An official emissary, especially an official representative of the pope.

A legacy.

A person commissioned to represent a state, or the highest authority in the state, in a foreign state or court; a deputy; an ambassador.

Specifically In Roman history, a foreign envoy chosen by the senate, or a lieutenant of a general or of a consul or other magistrate in the government of an army or a province.

One who is delegated by the Pope as his representative in the performance of certain ecclesiastical or political functions, or both.