Mont de Milieu is a 1er Cru vineyard site located on the eastern banks of the Serein River and produces age-worthy wines from this exceptional terroir. The vines are planted in Kimmeridgian soils rich in clay and limestone with fossilised seashells. Domaine Goulley's old Chardonnay vines were planted in 1968 and converted to organic status in 2005; since then, they have been cultivated without chemical treatments. The vineyard has a south-to-southwestern exposure and sits at 150 to 190 metres elevation. This encourages good diurnal temperature differences, encouraging the grapes to accumulate good fruit concentration while retaining refreshing natural acidity from the cooler nights.