It’s a song every American has heard countless times, but how much do you really know about our national anthem?

The original lyrics referred specifically to the then British monarch King George ... calling for a uniquely English national anthem to be adopted, was debated in the British parliament.

According to the royal family's official website, the national anthem in its present form "dates back to the 18th century" but "the words and tune are anonymous and may date back to the ...