Donald Pfanz spoke about Chatham Manor, the only known house in the U.S. visited by both George Washington and Abraham Lincoln. Built in 1771 by William Fitzhugh, it was a Union headquarters during the Civil War and later a hospital where Clara Barton and Walt Whitman tended to the wounded and dying. Chatham was given to the National Park Service in 1975 and is part of the Fredericksburg and Spostylvania National Military Park.