The State Bank Building, Decatur Branch, commonly known as the Old State Bank, is a historic Jeffersonian-style bank building in Decatur, Alabama, United States. It was recorded by the Historic American Buildings Survey in 1934 and 1935. It was added to the National Register of Historic Places on March 24, 1972, due to its architectural significance.HistoryThe Decatur branch of the Alabama State Bank opened its doors on July 29, 1833. It was authorized by the Alabama General Assembly in 1830 to be one of three branches of the Alabama State Bank. After outstanding debts of over $1 million were unable to be reformed the Decatur branch franchise was revoked. The building remained vacant until the 1860s when it was one of four buildings that survived the Civil War in Decatur, Alabama. During the Battle of Decatur, the bank was used as headquarters for the Union forces in the area and was also used as a hospital while battles raged outside. Such evidence of the battle remains: bloodstains are visible in one of the three vaults and slugs from musket fire and Minié balls are still clearly seen in the walls of the building.In 1881, the First National Bank opened its doors in the Old State Bank building. But, when First National Bank completed its new office in 1902, the bank building was used as a residence and office by J. Y. Cantwell. After signs of deterioration began to show themselves, Cantwell's grand niece, W. B. Edmundson, deeded the building over to the City of Decatur in 1933. Management of the structure was vested in an eight-member Board of Governors. The petition for restoration was presented to the Civil Works Administration and restoration commenced. Being one of only a handful of local buildings to survive the destruction of the American Civil War, and after going through the many changes over the years, the Old State Bank has become a symbol of historical significance.