Château de Boursault, Boursault, close to Epernay, in the Champagne-Ardenne region, France. A castle French of Renaissance style. Built between 1842/1848 for the famous Veuve Clicquot , owner of the eponymous Champagne house. During WWI and WWII, it was transformed into a military hospital. The castle is surrounded by a vineyard that produces Château champagne Boursault developed at the castle since 1927 and raised in its cellars.