BALTIMORE (WJZ) — The United States Coast Guard set the historic Francis Scott Key buoy on the Patapsco River.

The specially designed Star-Spangled buoy marks the approximate location where Francis Scott Key wrote the country’s national anthem during the bombardment on Fort McHenry in 1814.

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The buoy sits between the Francis Scott Key Bridge and Fort McHenry.

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It’s set every summer and removed just before the winter.

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This is the 40th year.