EPERNAY (the ancient Aqua Perennes), a town of France, in the department of Marne, and capital of a cognominal arrondissement. It is situated near the left bank of the Marne, 20 miles W.N.W. of Chalons. Pop. (1851) 7386. This was formerly a place of some strength, but its fortifications have fallen into decay. The town is neat, clean, and tolerably well built. It is best known as being the principal entrepot for Champagne wines, which are kept here bottled in extensive vaults excavated in the sandstone on which the town is built.