Longchamp, the racecourse, lying on the south-west side of the Bois du Boulogne, on the west of Paris, where the race for the Grand Prix is run. It was formerly the custom for the great folk of Paris to drive out in this direction, as far as the old nunnery of Longchamp (founded in 1260), during the week preceding Easter.
Longchamp
Chambers's Encyclopaedia, Volume 6: Humber to Malta, p. 709
Source scan(s): p. 0724