Charleston was named one of four leading cities for Semiquincentennial events.
The United States Semiquincentennial Commission’s legislation directed special attention to locations of historical significance. It specifically identified Boston, Philadelphia, New York City, and Charleston, South Carolina, as leading cities for anniversary activities.
Charleston’s inclusion reflects its importance in the colonial and Revolutionary-era history of the United States. The city was a major port and political center in the southern colonies, and South Carolina played a significant role in the Revolutionary War.
The answer is Charleston rather than Columbia, the modern capital of South Carolina. Savannah and Raleigh are also historically important southern cities, but neither was the South Carolina city named in the federal list of four leading Semiquincentennial locations. The designation concerned event planning, not national-capital status.