TODAY marks some notable anniversaries including a British Prime Minister being shot and a chess champion getting beaten by a computer.

Here is our look back at some historic events and celebrity birthdays being celebrated on May 11.

330: Constantinople became the new capital of the Roman Empire.

1812: British Prime Minister Spencer Perceval was shot dead by a bankrupt broker, John Bellingham, as he entered the House of Commons.

1888: Songwriter Irving Berlin was born as Israel Baline in Siberia.

1949: Siam changed its name to Thailand.

1981: Reggae singer Bob Marley died of cancer.

1985: A fire broke out in the main stand of Bradford City football ground and 56 spectators died.

1997: World chess champion Gary Kasparov was defeated by IBM supercomputer Deep Blue.

2010: Conservative Party leader David Cameron became prime minister with Liberal Democrat leader Nick Clegg announced as his deputy.

ON THIS DAY LAST YEAR: A historic Welsh castle that once appeared in an episode of Doctor Who attracted "huge amounts of interest", after going on the market for £1 million.

BIRTHDAYS: Louis Farrakhan, leader of Nation of Islam, 86; Eric Burdon, rock singer (The Animals), 78; Pam Ferris, actress, 71; Jeremy Paxman, broadcaster, 69; Frances Fisher, actress, 67; John Parrott, former snooker player/commentator, 55; Holly Valance, actress and singer, 36.