Opus one is one of napa valley's most important wineries. The winery began as a�partnership�between robert mondavi and baron philippe de rothschildOpus one is a bordeaux-style blend made from a selection of five grape varietals � cabernet sauvignon, cabernet franc, merlot, malbec and petit verdot.The winemaking team focuses around traditional approaches wherever they work best, and�integrate modern techniques�where they benefit the process, after stringent evaluation and rigorous research.