Originally called the Eshcol Winery, designed by Hamden McIntyre, Trefethen Vineyards Historic Winery building was built in 1886. The three-story gravity flow winery is listed in the National Register of Historic Places and is one of the most iconic historic wineries in the Napa Valley. The structure was badly damaged in the 2014 Napa earthquake and nearly collapsed. The repair and renovation included straightening and leveling the building through computerized hydraulic pumps and cables. New concrete foundations, exposed steel seismic moment frames, and shear walls were added throughout the building. The renovation also included a full remodel of the interior, where tasting rooms, barrel chais, and conference rooms were reconfigured into the new space.