The following is extracted from the Nichelini website:

Nichelini is one of California's most historic wineries. Homesteaded in 1884 by Anton Nichelini, a Swiss-Italian immigrant, it is the oldest "continuously family owned and operated" winery in the Napa Valley....The original Roman press is the centerpiece of the visitor area, and is believed to be the only one still standing at a Western Hemisphere winery.

Presently, fourth generation members of the Nichelini family continue to carry on the 100+ year-old traditions of this historic Napa Valley winery.