Elgin is the county town of Moray in north-east Scotland, best known for its ruined cathedral which made it a "city". Together with nearby Lossiemouth it's the service town for two nearby RAF bases.
The "Elgin Marbles" have only the most tenuous connection with this place. It was the 7th Earl of Elgin who in the early 19th century removed (or looted or legally purchased or rescued from destruction, take your pick) many friezes and sculptures from the Acropolis in Athens - they're now in the British Museum. But the family residences were in Fife and elsewhere, and none of the Earls of Elgin lived here.