Atlanta Historical Society

The Atlanta History Center is a history museum located in the Buckhead district of Atlanta, Georgia. The Museum was founded in 1926, and currently consists of 6 permanent, and several temporary, exhibitions. There are also historic gardens and houses located on the grounds, including the Swan House and Tullie Smith Farm. The Museum houses the Kenan Research Center, which includes 3.5 million resources and a reproduction of historian Franklin Garrett's (1906–2000) office. The Museum also has one of the largest collections of Civil War artifacts in the U.S.

More information on the Wikipedia page

The website is.