Located in the village of Parnay along the banks of the Loire, Château Yvonne dates back to the 16th century with its winemaking roots traceable to 1813. In 1997, the estate was acquired by Yvonne (after whom the château is named) and Jean-François Lamunière, who re-established the vineyard with guidance from Françoise Foucault (wife of Charly Foucault from the iconic Clos Rougeard).
In 2007, Mathieu Vallée took over the estate. The son of a winegrower, he gradually expanded it. Today, he tends 19 hectares of vines, 6 planted with white varieties and 13 with red, cultivating Chenin Blanc, Cabernet Franc and Pineau d’Aunis. Organically certified since 1997, the grapes are harvested by hand.
The work in the winery is also very natural, with as little intervention as possible. Fermentation take place using indigenous yeasts and malolactic fermentation is spontaneous. Mathieu Vallée's talent is gradually becoming established given the quality and consistency of his wines, even in difficult years. Château Yvonne has firmly established itself as a reference in Saumur.

Mathieu Vallée produces a very fine single varietal Chenin grown on soils which are typical of the region: tuffeau soils. After harvesting the bunches by hand, the fermentation and ageing is done in barriques. Powerful, stimulating and rich, this white wine can be kept for ten years in the cellar.