This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
FloatingBatteryDrawing. Floating Battery of Charleston Harbor Barnes Frank nps gov Fort Sumter National Monument South Carolina National Park Service Historical Handbook Series No Washington Reprint National Park Service PDUSGov Charleston South Carolina in the American Civil War Memorials of the American Civil War