A piece of American history is changing hands in Washington, D.C.’s Dupont Circle neighborhood. The 1875 town house where civil rights pioneer Frederick Douglass married his second wife, Helen Pitts, in 1884 has found a buyer just days after hitting the market at $1.8 million, according to a report by Realtor.com. Don’t Miss: Maker of the $60,000 foldable home has 3 factory buildings, 600+ houses built, and big plans to solve housing —you can become an investor for $0.80 per share today.‘Beating the market through ethical real estate investing’ — this platform aims to give tenants equity in th…