Theorem Vineyards

06/26/2026

Moon Mountain is traditionally thought of as Cabernet territory. Swipe for the truth about why we grow Sauvignon Blanc here. Old vines, steep slope, volcanic soils, high elevation. The struggle is the point.

06/21/2026

To every father building something to hand down: we're raising a glass to you.

06/18/2026

Inside the making of our 12-foot bronze key.

Kisha and Jason wanted a sculpture with a story to live between our historic buildings and oldest vines. There was only one choice: a vintage key — the symbol on every bottle of our flagship Diamond Mountain Cabernet Sauvignon, Voir Dire ("to speak the truth").

We make single-vineyard, single-varietal wines that tell the truth of place and time. Every bottle unlocks that truth — it's why the Theorem logo was drawn from a keyhole. Kisha also found design inspiration in the old keys that opened the original doors to all the historic buildings.

Finding an artist who could help us bring this vision to life was no easy feat. Our branding and packaging design consultant, Casey Dillon of Bronze SF discovered Artworks Foundry, one the nation's leading foundries for the production and restoration of bronze sculptures, reliefs, and monuments—just one hour from the winery.

Artworks Foundry is one of the nation’s leading fabricators of large-scale bronze monuments. The Berkeley studio, let by CEO Kambiz Mehrafshani, has cast for artists Ruth Asawa, Peter Voulkos, Nathan Oliveira and for organizations such as National Geographic, Lucas Film, and even a 27-foot bronze lion in honor of the San Diego Zoo’s centennial.

Our estate buildings date back to the 1800s, but the method employed to create our towering key — lost-wax bronze casting — is roughly a thousand years old. Much like winemaking, the art of bronze casting takes skill, patience, and the ability to work with pieces of a puzzle that combine to create something much greater.

Old methods for old ground. The kind one of Napa Valley's oldest farmsteads deserves.

Every tasting experience at our Calistoga winery estate begins steps from this towering key, overlooking our heritage vineyard and historic buildings. Plan your visit: www.theoremvineyards.com.

Photos by Briana Marie Photography and Jimmy Hayes

06/17/2026

We only make the wines we want to drink. A fire lit, a steak off the grill, the conversation that only happens when no one's in a hurry to leave. These are life's real pleasures. Our Hawk's Prey Diamond Mountain Cabernet has the bright red fruit and beautiful lift you want for live-fire cooking, and high-toned tannins that cut clean through a perfectly charred steak.

06/13/2026

A Napa Valley weekend, the way it should feel. Diamond Mountain, from above.

06/11/2026

06/09/2026

The people of Theorem Vineyards are a key to our success. Meet Wade Estes. Wade looks after the living parts of the estate — the bees, the trees, the tomatoes, every plant in the culinary garden and estate grounds. A Napa Valley native and certified arborist, he came to wine the long way: organic farms across Europe, an apple orchard in Philo, a cattle ranch in Colusa, a small Calistoga winery.

And when winemaker Andy Jones needs a hand in the cellar, Wade is there for that too.

06/05/2026

05/30/2026

I’m going to let you in on a little secret.

I didn’t buy this property because of the vineyard.

I bought it because of the house.

The wrap-around porch stopped me. Something about it pulled me back to growing up in Louisiana — to watching my mother work in her antique store, to porches that meant something, to houses that had lived long enough to have a point of view.

I grew up in a place steeped in history. I know what it feels like when a place is telling you something. I know when you are supposed to listen. This place was telling me to stay.

What we found when we looked closer was something we didn’t fully understand yet: one of the last remaining historical collections of 1800s-era buildings in Napa Valley was on this estate. A farmhouse. A schoolhouse believed to be the oldest in the valley. A long barn from the 1880s. A red barn that had partially collapsed — protected by a historic designation, which meant we couldn’t touch it until it fell, and then we had the honor of building it back exactly as it was. So we did.

Every restoration decision came from the same place: keep what’s real. The floors became walls. The walls became ceilings. The original hardware stayed. The iron work stayed. We opened up windows and let the mountain back in.

The vineyard, it turned out, was just as abandoned as the buildings. Heritage Cabernet planted in 1985, left to its own devices, no inputs, no attention — vines that had been finding their own way for forty years. That’s organic farming in its purest form. We didn’t rip them out. We brought them back into balance with what’s new, the same way we did with every building on this property. And we found quality we could never have imagined.

Restore, don’t replace. That’s the only philosophy that made sense here.

It started with a porch that reminded me of home. — Kisha Itkin, CEO