FREE ADMISSION! Our Mission The Washington Historical Society is dedicated to the curation, preservation and interpretation of the history and heritage of the Washington, Missouri, area. Through maintenance of an archival collection, public museum and the development of educational programs, the WHS seeks to ensure the accessibility of that heritage. Our Museum Encompassing about 6,000 square feet and two floors of exhibits, the museum focuses on the history and culture of Washington, Missouri. Learn about the corn cob pipe industry, Schwarzer zithers, John B. Busch Brewing Co., the Missouri River, Native Americans, and much more.