Fosse Sèche is a historic wine estate in Vaudelnay, Loire Valley, first mentioned in 1238. Vines have long been cultivated, encouraged by the Benedictine monks of Montreuil-Bellay. Medieval vats, a 16th‑century wall, a communal oven, a chapel, and a dovecote still mark the site. Today, heritage blends with a modern, precision approach: 11 ovoid concrete tanks, inspired by ancient dolia and shaped by the golden ratio, enable gentle, natural élevage so terroir and grape variety speak without artifice. All wines come exclusively from estate-grown grapes. Farming is organic and biodynamic, prioritizing living soils and ecosystem balance. The property spans 45 hectares in a single block, with 15 hectares planted to vines and 30 hectares kept natural as meadows, hedges, wetlands, and trees to support biodiversity. A wetland area hosts over 4,500 trees, annual melliferous flowers for pollinators, wildlife shelters, and biodiversity monitoring. A plant-based wastewater treatment system (installed 2024) naturally purifies groundwater. The project is led by the Pire and Séché families, united by respect, transmission, and authenticity, with Guillaume Pire crafting precise bottlings rooted in Fosse Sèche.