The birthplace of the Old Fashioned's refined cousin
The Pendennis Club in Louisville, Kentucky (founded 1881) claims to be the birthplace of the Old Fashioned. This cocktail also bears their name.
Rothman & Winter or Giffard apricot liqueurs are excellent choices. Avoid artificially flavored options.
The apricot can be sweet, so the lime juice is essential for balance. Don't skip it or reduce it.