How many acres is the district in Selma where  the most popular style of house in the Southern United States from the end of the American Civil War (1861–65) through the 1920s be found?
Old Town Historic District (Selma, Alabama):  The district includes examples of the Federal, Greek Revival, Italianate, Gothic Revival, Victorian, Shotgun, Queen Anne, Romanesque Revival, Renaissance Revival, and Classical Revival. Shotgun house: A "shotgun house" is a narrow rectangular domestic residence, usually no more than about 12 feet (3.5 m) wide, with rooms arranged one behind the other and doors at each end of the house. Shotgun house:  It was the most popular style of house in the Southern United States from the end of the American Civil War (1861–65) through the 1920s.
i don't know