Built in 1777, the site is listed with the National/State Registry of Historic Sites. Revolutionary War prison, staging point for Lewis and Clarke expedition, State Armory in 1812, Civil War general hospital, First Maryland School for the Deaf building, and more. Hours: Open for special events, by appointment, and on the second Saturday of every month, May – Dec (also open the second Sunday in Sept) 12-4 PM.

101 Clarke Place Frederick, MD 21701