Surrounded by the urban sprawl of Bordeaux and facing each other across the street are Châteaus Haut Brion and La Mission Haut Brion. The modern history of Mission Haut Brion dates from 1919 when Frédéric Woltner bought the estate. He, together with his sons, revitalised La Mission, installing the, then, cutting edge technology of temperature-controlled fermentation and restructuring the vineyards. However the next generation of Woltners fell into discord and sold La Mission Haut Brion to Domaine Clarence Dillon SA, owners of Château Haut Brion in 1983, bringing the two neighbours under the same ownership. Since then, La Mission Haut Brion has grown considerably in reputation and ranks among the best château, not only in Pessac-Léognan, but in Bordeaux as a whole. There are 21ha of vines, planted with 45% each of Cabernet Sauvignon and Merlot, with the balance being Cabernet Franc. Red wines are aged in 100% new oak for just under 2 years.