Fontaine-sur-Ay

Avenay-Val-d'Or (French pronunciation: [avnɛ val dɔʁ]) is a commune in the Marne department, northeastern France. Located in the Vallée de la Marne, part of the Champagne region, its primary industry is viticulture.

Val de Livre (French pronunciation: [val də livʁ]) is a commune in the Marne department, northern France. The municipality was established on 1 January 2016 and consists of the former communes of Tauxières-Mutry and Louvois.

Tauxières-Mutry (French pronunciation: [toksjɛʁ mytʁi]) is a former commune in the Marne department in north-eastern France. On 1 January 2016, it was merged into the new commune Val de Livre.

Bisseuil (French pronunciation: [bisœj]) is a former commune of the Marne department in northeastern France. Since January 2016, Bisseuil is part of the administrative commune Aÿ-Champagne.

Ville-en-Selve (French pronunciation: [vil ɑ̃ sɛlv]) is a commune in the Marne department in north-eastern France.

Louvois (French pronunciation: [luvwa]) is a former commune in the Marne department in north-eastern France. On 1 January 2016, it was merged into the new commune Val de Livre. The trouvère Jehan de Louvois was lord of the place in the 13th century.

Mutigny (French pronunciation: [mytiɲi]) is a commune in the Marne department in north-eastern France.

The Château de Mareuil is a château in Mareuil-sur-Ay, Marne, France.

Germaine (French pronunciation: [ʒɛʁmɛn]) is a commune in the Marne department in north-eastern France.

Billecart-Salmon is a medium-sized champagne house in Mareuil-sur-Aÿ, France. Founded in 1818 with the marriage of Nicolas François Billecart and Elisabeth Salmon, it is one of the few to remain family owned. The Cuvée Nicolas-Francois Billecart 1959 won first place in the Champagne of the Millennium 1999, out of 150 of the finest 20th century Champagnes. A magnum of the winning champagne later sold for £3,300. Billecart-Salmon was ranked tenth among major Champagne houses by Antoine Gerbelle writing for La Revue du vin de France. La Revue du vin de France's Guide Vert awards Billecart-Salmon two stars out of three. Billecart-Salmon Brut Reserve are aged in the cellars for 36 months before release. Billecart-Salmon champagnes have been reviewed favourably by wine writer Jancis Robinson. The current President is, since 2019, Martin Solibakke-Billecart who represents the family’s seventh generation.."

Mareuil-sur-Ay (French pronunciation: [maʁœj syʁ aj], literally Mareuil on Ay) is a former commune in the Marne department in north-eastern France. Since January 2016, Mareuil-sur-Aÿ is part of the administrative commune Aÿ-Champagne. Its population was 1,113 in 2019. The patron saint is Saint Trésain.

Tours-sur-Marne (French pronunciation: [tuʁ syʁ maʁn], literally Tours on Marne) is a commune in the Marne department in north-eastern France.