Fort Sumter was designed as A star fort.

Fort Sumter was built as a star fort, a type of military structure known for its star-shaped design featuring bastions at each corner. This layout was specifically created to enhance defense against possible naval assaults. The angled walls of the star fort facilitated optimal cannon positioning and provided better coverage of the surrounding area. Erected in the early 19th century, Fort Sumter played a crucial role in coastal defense for Charleston Harbor. Its design embodied the military architectural trends of the time. It was intended to endure sieges, making it a vital strategic asset during the Civil War, especially during the bombardment that signaled the war's onset.