Italian philospher, alchemist, and Copernican theory advocate Giordano Bruno was burned at the stake for heresy by the Inquisition.
The electoral tie between Thomas Jefferson and Aaron Burr was broken by the House of Representatives who elected Jefferson president.
Baltimore became the first U.S. city lit by gas.
The Confederate submarine Hunley, equipped with an explosive at the end of a protruding spar, rammed and sank the Union's ship Housatonic off the coast of Charleston, S.C.
Puccini's opera Madama Butterfly premiered in Milan.
President Richard Nixon left on his trip to China.
Chess champion Garry Kasparov beat the IBM computer, Deep Blue, winning the six-game match.
Kosovo declared independence from Serbia.