Ivoy-le-pré is the native village of Nicolas Leblanc who invented the modern washing-powder after extracting soda from the sea-salt. The village is doted with a rich cultural and architectural legacy (XIIIth century church, Maison Rouge (the Red House), a XVIIth century priory and a washhouse that was still used at the beginning of the 20th century. The village is parted by « the great giant ditch » whose origins are still unexplained : a legend and controversy debate among historians… but it shelters the « Bréviande » fountain.