‘Sostrera’ is the word for ‘solera’ in the local Catalan parlance of Banyuls. Dr. Gaston Parcé established the solera at Mas Blanc in 1925 with two layers of demi-muids (650-litre barrels) full of wine. The Domaine bottled the first wine from the solera in 1946. This commitment to extended aging within the Sostrera continues today. The wine is 100% Grenache noir.