This justly famous winery represents one of the most celebrated international winemaking ventures in modern history. Founded in 1979, Opus One was a joint venture between Robert Mondavi and Baron Philippe de Rothschild of Chateau Mouton Rothschild. The Pauillac/Napa Valley enterprise was a long-time dream of both winemaking families and from Opus One’s first vintage in 1979 it was clear that the idea was to make a wine with character that represented the best of both Bordeaux and Napa Valley. Even the label represents a meeting of the two legendary families, since the label shows a stylized profile of both Robert Mondavi and Baron Philippe de Rothschild. Opus One has earned high praise over the years and is considered one of Napa Valley’s signature wines. The winery owns vineyards in Oakville and grows Cabernet Franc, Cabernet Sauvignon, Malbec, Merlot, Petit Verdot, Sauvignon Blanc and Semillon. About 30,000 cases are produced annually. In 2005 Constellation Brands purchased the Robert Mondavi Corp. and assumed 50% of the ownership of Opus One. The other half is still owned by Baron Philippe de Rothschild, S.A.