Opus One is a prestigious winery located in the Napa Valley of California, known for producing high-quality wines. Founded in 1979 as a joint venture between Robert Mondavi, a prominent American winemaker, and Baron Philippe de Rothschild, a renowned French vintner, Opus One combines the best of both New World and Old World winemaking techniques. The winery primarily focuses on creating a Bordeaux-style blend, predominantly using Cabernet Sauvignon, along with Merlot, Cabernet Franc, Malbec, and Petit Verdot. Opus One wines are celebrated for their elegance, complexity, and aging potential, making them highly sought after by collectors and wine enthusiasts worldwide.