Eugène Mercier was a French businessman and entrepreneur, best known for founding the Mercier Champagne house in 1858. He played a significant role in popularizing champagne, particularly through innovative marketing strategies and the production of high-quality sparkling wines. His efforts helped establish Champagne as a prestigious beverage worldwide. Mercier was also known for his ambitious projects, including the construction of an extensive network of underground cellars in Épernay, France. These cellars not only served as storage for his champagne but also became a tourist attraction, showcasing the rich history and craftsmanship behind the production of this iconic drink.