Answer:
>The Star spangled Banner was Written by Francis Scott Key On September 13th 1814.
>It was declared the national anthem by President Hoover in 1931.
>The first public printing of it was on September 17th 1814 in a leaflet published in Baltimore. Only two original copies survive to this day.
>The Flag that inspired the anthem has been in the collection of the smithsonian Institution since 1912.
>One of it's first performances at a sporting event was at the 1918 World Series.