General Daniel Roberdeau was a wealthy merchant in the late 18th century, a member of Congress, and one of the few who signed the Articles of Confederation. As first Brigadier General of Pennsylvania Militia, he operated a land mine and supplied bullets to the army of Washington. Now, for the first time in 40 years, his 1780s townhome is on the market with an asking price of $3.7 million. The 6,074-square-foot home has six bedrooms, four-and-a-half bathrooms, and four stories with a basement. Listed in the Historic American Building Survey, the townhome's historic details can be found in the flooring, staircase, moldings, and door casings. Not enough history for you? There's also a keystone arch in the front hallway, 11-foot-high ceilings and eight fireplaces, not to mention a view of the Potomac River from one of the bedrooms.