Calixa Lavallée

Calixa Lavallée (French pronunciation: [kaliksa lavale]; December 28, 1842 – January 21, 1891) was a Canadian musician and Union Army band musician during the American Civil War. He was born in the Province of Canada. He is best known for composing the music for "O Canada", which officially became the national anthem of Canada in 1980, after a vote in the Senate and the House of Commons. The same 1980 Act of Parliament also changed some of the English lyrics.