The Mansion - O Street Museum Foundation

The Mansion at the O Street Museum (2020 O Street NW) is a complex of interconnected row houses converted into a private museum, event space, and cultural venue notable for its many concealed doors, rooms, and unusual interior configurations. The institution operates guided tours of its eclectic collections, period rooms, and performance spaces, and advertises the building's network of secret passages and hidden entrances as a distinguishing feature. The site functions as a museum and event venue in the Dupont Circle/Golden Triangle area.