Opus One is a joint venture between which two wineries?

Opus One is indeed a joint venture between Baron Philippe de Rothschild and Robert Mondavi. Founded in 1979, this collaboration aimed to create a premium Napa Valley wine that embodies the style of Bordeaux while incorporating the rich character of California. Both partners brought their unique expertise to the project: Mondavi with his knowledge of California winemaking and Rothschild with his prestigious Bordeaux legacy.

This partnership not only integrated the best practices from both regions but also highlighted the blending of Old World traditions with New World innovation. The resulting wine has gained global acclaim, representing a pinnacle of winemaking in Napa Valley.