favorite

A favourite was the intimate companion of a ruler or other important person. In post-classical and early-modern Europe, among other times and places, the term was used of individuals delegated significant political power by a ruler. It was especially a phenomenon of the 16th and 17th centuries, when government had become too complex for many hereditary rulers with no great interest in or talent for it, and political institutions were still evolving. From 1600 to 1660 there were particular successions of all-powerful minister-favourites in much of Europe, particularly in Spain, England, France and Sweden.
By the late 17th century, the royal favourite as quasi-Prime Minister declined; in France, the King resolved to rule directly, while in Britain, as the power of the monarch relative to Parliament declined, executive power slowly passed to the new office of Prime Minister and other parliamentary ministers.
The term is also sometimes employed by writers who want to avoid terms such as "royal mistress", "friend", "companion", or "lover" (of either sex). Some favourites had sexual relations with their monarch (or the monarch's spouse), but this was far from universal. Many were favoured for their skill as administrators, while others were close friends of the monarch.
The term has an inbuilt element of disapproval and is defined by the Oxford English Dictionary as "One who stands unduly high in the favour of a prince", citing Shakespeare: "Like favourites/ Made proud by Princes" (Much Ado about Nothing, 3.1.9).

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