In what city was the star-spangled banner written?

Answer: Maryland

Explanation:

On this day in 1814, Francis Scott Key pens a poem which is later set to music and in 1931 becomes America's national anthem, "The Star-Spangled Banner." The poem, originally titled "The Defence of Fort McHenry," was written after Key witnessed the Maryland fort being bombarded by the British during the War of 1812.

Francis Scott Key wrote it. Also it was made in Fort McHenrey.