This image shows the so-called Shirley House, located on the grounds of the Vicksburg National Military Park in Mississippi.
The description states:
SHIRLEY HOUSE, VICKSBURG NATIONAL MILITARY PARK…
A landmark during the Siege of Vicksburg, is the only surviving wartime structure in the Park.
–The house was captured by the advancing Union forces before the withdrawing Confederate soldiers could destroy it. The occupants were captured unharmed and housed in a cave nearby.
This card likely dates from the 1950s.