Opus One Winery is located in Oakville, California, USA, and is renowned for its pursuit of excellence in wine production. Originally named Napamedoc until 1982, the wine became known as Opus One after the winery was founded as a joint venture between Baron Philippe de Rothschild of Château Mouton Rothschild and Robert Mondavi. The goal was to create a Bordeaux-style blend using grapes from Napa Valley. The first vintage, dating back to 1979, was released in 1984, alongside the 1980 vintage. At that time, Opus One became one of the most expensive Californian wines and continues to be one of the most sought-after reds from Napa Valley. What distinguishes Opus One is its philosophy of sustainable viticulture, with careful vineyard management prioritizing soil health, responsible water use, and the promotion of biodiversity. The winery is dedicated to environmental preservation and innovation, aiming to produce wines of superior quality. Opus One specializes in crafting red wines, predominantly using Cabernet Sauvignon, Merlot, Cabernet Franc, Petit Verdot, and Malbec grapes.