Built in 1804, the main brick building served as an auction house and store, known as "Buck's Auction Room." After the Civil War, it was the temporary home of Brig. Gen. Darrel Ruggles, CSA, inventor and designer of railroad equipment. From 1872 to 1874, the building served as the Fredericksburg Post Office, Horton's Auto Supply in 1921 and became a restaurant known as "Dugan's" in 1930. Dugan's occupied the building until 1980 when it was purchased by the present owners who opened "Sammy T's."