The wreath on the door commemorates Confederate Memorial Day which is a state holiday in some states in the US. In Georgia, it was April 27th. It gives people a chance to honor and remember the Confederate soldiers who died or were wounded during the Civil War in the 1860s. Old Stone Church was used as a hospital.
UPDATE: This painting has been donated to the United Daughters of the Confederacy, Catoosa Chapter 1987, who placed this wreath.
