Restored to house the Hugh Mercer Apothecary Shop, this 18th-century building is now a museum of medicine, pharmacy, and military and political affairs. Dr. Hugh Mercer cared for the citizens of Fredericksburg for fifteen years with contemporary medicines and treatments, including leeches, lancets, snakeroot, and crab claws. One of his most notable patients was Mary Washington, mother to George Washington. Mercer later left his practice to join the cause of the Revolutionary army, dying as a Brigadier General at the Battle of Princeton.