A legation was the term used in diplomacy to denote a diplomatic representative office lower than an embassy. The distinction between a legation and embassy was dropped following the Second World War, as all diplomatic representative offices were now designated as embassies, or high commissions. The United Nations, with its headquarters in New York City, is the largest international diplomatic organization. ... A diplomatic mission is a group of people from one nation state present in another nation state to represent the sending state in the receiving State. ... This article is becoming very long. ... A High Commissioner is a person serving in a special executive capacity. ...
Hence the legate differs from the delegate, taking this term in a strictly juridical sense, since the delegate is one to whom the pope entrusts an affair or many affairs to be treated through delegated jurisdiction and often in questions of litigation, whereas the legate goes with ordinary jurisdiction over a whole country or nation.
Since the jurisdiction of a legate is ordinary, he does not cease to be legate even at the death of the pope who appointed him, and even if he arrived at his post after the death of that pope.
The legate a latere is always a cardinal, and this name arises from the fact that a cardinal, being a member of the senate of the pope, is considered as an intimate, one attached to the very side of the Roman Pontiff.
The history of the office of papal legate is closely involved with that of the papacy itself.
If it were proved that papal legates exercised the prerogatives of the primacy in the early councils, it would be one of the strongest points for the Roman Catholic view of the papal history.
Augustine of Canterbury is sometimes spoken of as legate, but it does not appear that in his case this title was used in any strictly technical sense, although the archbishop of Canterbury afterwards attained the permanent dignity of a legatus natus.