Today is the 344th day of the year, with only 21 days remaining until the end of the year.
1520 - Martin Luther burns his copy of the papal bull Exsurge Domine outside Wittenberg's Elster Gate.
1684 - Isaac Newton's derivation of Kepler's laws from his theory of gravity, contained in the paper, De motu corporum in gyrum, is read to the Royal Society by Edmund Halley.
1817 - Mississippi becomes the 20th state admitted to the Union.
1864 - Major General William T. Sherman's Union Army troops reach the outer Confederate defenses of Savannah, Georgia.
1868 - The first traffic lights are installed, outside the Palace of Westminster in London. They use semaphore arms and are illuminated at night by red and green gas lamps.
1884 - Mark Twain's Adventures of Huckleberry Finn, is published for the first time.
1898 - The Treaty of Paris is signed, officially ending the conflict.
1901 - The first Nobel prizes are awarded.
1906 - President Theodore Roosevelt wins the Nobel Peace Prize, becoming the first American to win a Nobel Prize.
1935 - The Downtown Athletic Club Trophy, later renamed the Heisman Trophy, is awarded to halfback Jay Berwanger of the University of Chicago.
1965 - The Grateful Dead's first concert performance under their new name.