The Demets family produces and markets its Champagne at Gyé sur Seine in the heart of the Côte des Bar.

In the 1950s, André Brément (the family's maternal grandfather) started to plant vines while he was still a vineyard worker. Slowly but surely he developed his own operation. In 1972, Alain Demets, his son-in-law, began working in vineyard management, and later took over the family estate of his wife Marie to create Marie Demets Champagne. A few years later, Alain began to make their wines into champagne and to market them 1987 was his first vintage.

Today, the family tradition continues under the leadership of their son Peter.

At present, the vineyard covers 10 hectares with an annual production of 90,000 bottles.