Some parts of D.C. will soon play host to apartments on top of Walmarts, but historic properties are still the thing in fair Georgetown. Case in point, offerings like this nationally registered 10,000-square-foot Federal-style home currently listed at $11M. Built in 1797 by George Mason's nephew John Thomson Mason with bricks imported from England, the nine-bedroom was named Quality Hill by the subsequent owner, and has since "passed through the hands of many influential Georgetown residents," as the listing tells it, including Rhode Island senator and Pell Grant sponsor Claiborne Pell. According to The Georgetowner, Thomas Jefferson is said to have dined there, and the home didn't even have electricity until a renovation in the 1940s. Quality Hill last sold for $3.9M back in 2004, after which the current owners undertook a "meticulous" renovation—one that apparently set them back nearly as much as the current ask, which is also the same amount the nearby 'Halcyon House' sold for in 2012—touching up details like the "grand entertaining spaces with 14-foot ceilings" and the mahogany built-ins in the "elegant and inviting" library, which were inspired by George Washington's Mount Vernon.