Pomp and Circumstance March No. 1 is probably Elgar's best known work - especially to those of us who have played in the band for a graduation. ;-) The title of the work comes from Shakespeare's Othello:
The spirit-stirring drum, th'ear-piercing fife,
The royal banner, and all quality,
Pride, pomp, and circumstance of glorious war!"
I admit to liking this version from Fantasia 2000, depicting Noah's Ark and starring Donald Duck. It incorporates the first four marches of Pomp and Circumstance:
And we cannot forget this delightful recording of Elgar himself conducting the first march. His words to the orchestra beforehand: "Morning, gentlemen. Glad to see you all. Very light programme this morning. Please play this tune as though you've never heard it before."