The Napa Valley Historical Society is a nonprofit organization that operates a museum and research library in St. Helena, Napa Valley. The museum focuses on preserving and sharing the history of the Napa Valley region. It features exhibits on various aspects of local history, including agriculture, winemaking, and the development of the community. Visitors can explore artifacts, photographs, and documents that provide insights into the region's past. The museum also offers educational programs, lectures, and special events for visitors of all ages.