October 20

Events
Up to 1950
1548 - The city of La Paz, Bolivia, is founded.
1708 - The new Saint Paul's Cathedral in London, designed by Christopher Wren, is completed.
1714 - George I of Great Britain and Ireland is crowned.
1720 - Caribbean pirate Calico Jack is captured by the Royal Navy.
1728 - The Great Fire of Copenhagen break out, and lasts for three days.
1740 - Maria Theresa takes the throne of Austria. France, Prussia, Bavaria, and Saxony refuse to honour the Pragmatic Sanction and the War of the Austrian Succession begins.
1803 - United States Senate ratifies the Louisiana Purchase.
1818 - The Convention of 1818 is signed between the United States and United Kingdom. Among other things, it settles most of the Canada-United States border to run along the 49th parallel.
1827 - Battle of Navarino - a combined Turkish and Egyptian armada is destroyed by an allied British, French, and Russian naval force in the port of Navarino in Pylos, Greece. The most important result of this battle is the end of the Greek Liberation War and the affirmation of independence of modern Greece.
1831 - First day of trading on the Madrid Stock Exchange.
1883 - Peru and Chile signed the Treaty of Ancon, by which the Tarapaca province was ceded to the latter, bringing an end to Peru's involvement in the War of the Pacific.
1904 - Chile and Bolivia sign the Treaty of Peace and Friendship.
1910 - The hull of the ship RMS Olympic is launched in Belfast.
1914 - World War I: The First Battle of Flanders begins.
1935 - The Long March ends in China.
1943 - Cargo vessel Sinfra is attacked by allied aircraft at Suda Bay, Crete and sunk. 2,098 Italian POWs drown.
1944 - The Soviet army captures Belgrade, the capital of Yugoslavia
1944 - Liquid natural gas leaks from storange tanks in Cleveland, Ohio, then explodes; the explosion and resulting fire level 30 blocks and kill 130.
1947 - The House Un-American Activities Committee begins its investigation into Communist infiltration of Hollywood, resulting in a blacklist that prevents some from working in the industry for years.
1948 - A KLM Lockheed L-049 Constellation airliner crashes at Glasgow Prestwick Airport in Scotland, killing all 40 people on board.
From 1951
1952 - In then-British Kenya, leaders of the Mau-Mau uprising are arrested, including Jomo Kenyatta.
1968 - Former First Lady Jacqueline Kennedy marries Greek shipping tycoon Aristotle Onassis.
1970 - Siad Barre declares Somalia a socialist state.
1971 - West German Chancellor Willy Brandt wins the Nobel Peace Prize.
1971 - The Nepal stock exchange collapses.
1973 - The Saturday Night Massacre: President Nixon fires Attorney General Elliot Richardson and Deputy Attorney General William Ruckelshaus after they refuse to fire Watergate prosecutor Archibald Cox, who is finally fired by Robert Bork.
1973 - The Sydney Opera House opens.
1973 - The Six Million Dollar Man premieres on ABC.
1976 - The ferry George Prince is struck by a ship on the Mississippi River in Louisiana, killing 78 people. 18 survive.
1977 - A plane carrying Lynyrd Skynyrd crashes in Mississippi, killing several band members, including lead singer Ronnie Van Zant and guitarist Steve Gaines.
1982 - St. Louis Cardinals defeat Milwaukee Brewers 6-3 to win 9th World Series Championship.
1986 - Yitzhak Shamir begins his second office term as Israel's prime minister.
1991 - A magnitude 6.8 earthquake in northern India kills around 1,000 people.
1991 - The Oakland Hills firestorm kills 25 and destroys 3469 homes and apartments, causing more than $2 billion in damage.
1995 - NATO Secretary-General Willy Claes resigns.
1999 - Abdurrahman Wahid is elected President of Indonesia.
2004 - Susilo Bambang Yudhoyono becomes President of Indonesia.
2007 - South Africa wins the Rugby World Cup, defeating England in the final.
2011 - 2011 Libyan civil war: Forces loyal to the National Transitional Council take the city of Sirte, the last remaining pro-Gaddafi stronghold. Subsequently, Colonel Muammar al-Gaddafi is captured and killed.
2013 - Luxembourg holds an early election after long-serving Prime Minister Jean-Claude Juncker was involved in a spy scandal.
2014 - Joko Widodo becomes President of Indonesia.
2018 - Around 700,000 people march against Brexit (and for a second referendum on the issue) in London, in the biggest such gathering in the United Kingdom since 2003.
2018 - Donald Trump decides to pull the United States out of the Intermediate-Range Nuclear Forces Treaty with Russia.
Births
Up to 1900
1435 - Andrea Della Robbia, Italian sculptor (died 1525)
1463 - Alessandro Achillini, Italian philosopher (died 1512)
1469 - Guru Nanak Dev ji, The Founder of the Sikh religion.
1496 - Claude, Duke of Guise, French general (d. 1550)
1616 - Thomas Bartholin, Danish physician, mathematician and theologian (died 1680)
1632 - Sir Christopher Wren, English architect (died 1723)
1677 - Stanislaw I Leszczynski, King of Poland (died 1766)
1711 - Timothy Ruggles, American politician (died 1795)
1759 - Chauncey Goodrich, U.S. Senator from Connecticut (died 1815)
1780 - Pauline Bonaparte, French sister of Napoleon Bonaparte (died 1825)
1784 - Henry Temple, 3rd Viscount Palmerston, Prime Minister of the United Kingdom (died 1865)
1785 - George Ormerod, British historian and antiquarian (died 1873)
1801 - Melchior Berri, Swiss architect (died 1854)
1808 - Karl Andree, German geographer (died 1875)
1819 - The Bab, prophet founder of the Babi Faith, precursor to the Baha'i Faith (died 1850)
1819 - Carl Mikuli, Polish pianist (died 1897)
1822 - Thomas Hughes, novelist (died 1896)
1825 - Daniel Sickles, American politician, soldier and diplomat (died 1914)
1832 - Constantin Lipsius, German architect (died 1894)
1836 - Daniel Owen, Welsh novelist (died 1895)
1847 - Oscar Swahn, Swedish archer (died 1927)
1854 - Arthur Rimbaud, French poet (died 1891)
1854 - James F. Hinkle, 6th Governor of New Mexico (died 1951)
1858 - John Burns, English politician (died 1943)
1859 - John Dewey, American philosopher (died 1952)
1864 - James F. Hinkle, American politician, 6th Governor of New Mexico (died 1951)
1866 - Kazimierz Twardowski, Polish philosopher (died 1938)
1869 - Robin Welsh, Scottish curler and rugby union player (died 1934)
1873 - Nellie McClung, Canadian politician and activist (died 1951)
1874 - Charles Ives, American composer (died 1954)
1876 - Alexandre Pharamond, French rugby player (died 1953)
1882 - Bela Lugosi, Hungarian-American actor (died 1956)
1882 - Margaret Dumont, American actress (died 1965)
1887 - Prince Yasuhiko Asaka, Japanese diplomat (died 1981)
1890 - Jelly Roll Morton, American composer, musician (died 1941)
1891 - Jomo Kenyatta, President of Kenya (died 1978)
1891 - James Chadwick, English physicist (died 1974)
1893 - Charley Chase, early movie comedian (died 1940)
1894 - Olive Thomas, American actress and model (died 1920)
1895 - Rex Ingram, American actor (died 1969)
1897 - Crown Prince Eun of Korea (died 1970)
1900 - Wayne Morse, Senator from Oregon (died 1974)
1901 1950
1901 - Adelaide Hall, American-British pianist, composer and bandleader (died 1993)
1904 - Anna Neagle, English actress (died 1986)
1904 - Tommy Douglas, Scottish-Canadian politician, founder of public healthcare in Canada (died 1986)
1905 - Frederic Dannay (Ellery Queen), mystery novelist (died 1982)
1907 - Arlene Francis, television personality (died 2001)
1909 - Carla Laemmle, American actress (died 2014)
1910 - Bob Sheppard, American sportscaster (died 2010)
1913 - Grandpa Jones, American country music performer (died 1998)
1917 - Stephane Hessel, French diplomat and activist (died 2013)
1917 - Jean-Pierre Melville, French director and screenwriter (died 1973)
1918 - Robert Lochner, journalist, creator of Kennedy's "ish been oin bear-lee-ner" (died 2003)
1920 - Janet Jagan, American-born President of Guyana (died 2009)
1920 - Nick Cardy, American illustrator (died 2013)
1920 - Siddhartha Shankar Ray, Indian politician, Chief Minister of West Bengal (died 2010)
1923 - Robert Craft, American conductor (died 2015)
1923 - Otfried Preussler, German children's writer (died 2013)
1923 - Herschel Bernardi, actor (died 1986)
1924 - Robert Peters, American poet, scholar, playwright, editor and actor (died 2014)
1925 - Art Buchwald, newspaper columnist
1925 - Roger Hanin, French director and actor (died 2015)
1926 - Edward Douglas-Scott-Montagu, 3rd Baron Montagu of Beaulieu, English politician (died 2015)
1927 - Joyce Brothers, American psychologist, television personality (died 2013)
1928 - Li Peng, Chinese politician (died 2019)
1931 - Mickey Mantle, American baseball player (died 1995)
1931 - Richard Caliguiri, 54th Mayor of Pittsburgh (died 1988)
1931 - Zeke Bratkowski, American football player (died 2019)
1932 - Rosey Brown, American Pro Football Hall of Famer (died 2004)
1932 - William Christopher, American actor (died 2016)
1934 - Empress Michiko of Japan
1934 - Taku Mayumura, Japanese science fiction novelist (died 2019)
1934 - Eddie Harris, American jazz saxophonist (died 1996)
1934 - Timothy West, English actor
1934 - Bill Chase, American trumpeter (died 1974)
1935 - Roy Bailey, English folk singer and guitarist (died 2018)
1935 - Jerry Orbach, American actor (Law & Order) (died 2004)
1936 - Bobby Seale, American activist
1937 - Juan Marichal, Dominican baseball player
1937 - Wanda Jackson, American singer
1938 - Kathy Kirby, English singer (died 2011)
1942 - Christiane Nusslein-Volhard, German biologist
1945 - Romeo Benetti, Italian footballer
1946 - Elfriede Jelinek, Austrian writer, won the 2004 Nobel Prize in Literature
1946 - Chris Woodhead, English civil servant and academic (died 2015)
1947 - Tom Smith, American politician (died 2015)
1948 - Sandra Dickinson, British actress
1949 - Valeri Borzov, Ukrainian athlete
1950 - Tom Petty, American musician (died 2017)
1950 - Chris Cannon, American politician
1951 1975
1951 - Claudio Ranieri, Italian footballer and manager
1951 - Alma Muriel, Mexican actress (died 2014)
1951 - Al Greenwood, American rock musician
1953 - Bill Nunn, American actor
1955 - Sheldon Whitehouse, United States Senator
1955 - Aaron Pryor, world boxing champion
1955 - Thomas Newman, American composer and conductor
1956 - Danny Boyle, British movie director
1957 - Jane Bonham-Carter, Baroness Bonham-Carter of Yanbury, British politician
1957 - Hilda Solis, American politician
1958 - Viggo Mortensen, American actor
1958 - Ivo Pogorelic, Croatian pianist
1959 - Eriko Asai, Japanese long-distance runner
1959 - Akif Pirincci, Turkish-German author
1960 - Konstantin Aseev, chess player (died 2004)
1960 - Lepa Brena, Bosnian singer and actress
1961 - Ian Rush, Welsh footballer
1961 - Kate Mosse, English writer
1961 - Michio Tomizawa, Japanese voice actress
1962 - David M. Evans, American director and screenwriter
1963 - Nikos Tsiantakis, Greek footballer
1963 - Julie Payette, Canadian astronaut and Governor General of Canada
1964 - Kamala Harris, American lawyer and politician
1965 - Billy Zabka, American actor
1966 - Stefan Raab, German entertainer
1966 - Allan Donald, South African cricketer
1966 - Abu Musab al-Zarqawi, Jordanian militant and al-Qaeda member (died 2006)
1966 - Patrick Volkerding, American computer scientist and engineer
1967 - Monica Ali, British writer
1969 - Juan Gonzalez, baseball player
1970 - Nikky Smedley, British actress
1971 - Karl Collins, British actor
1971 - Dannii Minogue, Australian singer
1971 - Snoop Dogg, American rapper
1971 - Eddie Jones, American basketball player
1972 - Will Greenwood, English rugby player
1972 - Brian Schatz, American politician, United States Senator for Hawaii
From 1976
1976 - Nicola Legrottaglie, Italian footballer
1976 - Dan Fogler, American actor and director
1977 - Elena Berezhnaya, figure skating star
1978 - Paul Wilson, Scottish musician (Snow Patrol)
1978 - Virender Sehwag, Indian cricketer
1979 - John Krasinski, American actor
1981 - Dimitrios Papadopoulos, Greek footballer
1981 - Francisco Rodriguez, Mexican footballer
1981 - Willis McGahee, American football player
1983 - Michel Vorm, Dutch footballer
1984 - Andrew Trimble, Northern Irish rugby player
1984 - Mitch Lucker, American singer-songwriter (died 2012)
1985 - Dominic McGuire, American basketball player
1986 - Priyanka Sharma, Indian actress
1988 - Risa Niigaki, Japanese singer (Morning Musume)
1988 - Candice Swanepoel, South African model
1989 - Jess Glynne, English singer-songwriter
1989 - Yanina Wickmayer, Belgian tennis player
1992 - Ksenia Semenov, Russian gymnast
1994 - Morgan Featherstone, Australian model
1995 - Zhenwei Wang, Chinese actor and martial artist
Deaths
Up to 1950
460 - Aelia Eudocia, Byzantine Empress
1139 - Henry X, Duke of Bavaria
1631 - Michael Maestlin, German astronomer and mathematician (b. 1550)
1640 - John Ball, English Puritan clergyman (b. 1585)
1652 - Antonio Coello, Spanish poet and playwright (b. 1611)
1713 - Archibald Pitcairne, Scottish physician (b. 1652)
1740 - Charles VI, Holy Roman Emperor (b. 1685)
1842 - Grace Darling, English heroine (b. 1815)
1896 - Felix Tisserand, French astronomer (b. 1845)
1900 - Naim Frasheri, Albanian poet (b. 1846)
1907 - Said Pasha Kurd, Kurdish statesman (b. 1834)
1910 - David B. Hill, 29th Governor of New York (b. 1843)
1926 - Eugene V. Debs, American politician (b. 1855)
1935 - Arthur Henderson, Scottish politician (b. 1863)
1936 - Anne Sullivan, American teacher (b. 1866)
1940 - Gunnar Asplund, Swedish architect (b. 1885)
1946 - Piero Campelli, Italian footballer (b. 1893)
1950 - Henry L. Stimson, American statesman, lawyer and politician (b. 1867)
1951 2000
1957 - Michalis Dorizas, Greek javelin thrower (b. 1890)
1964 - Herbert Hoover, 31st President of the United States (b. 1874)
1966 - Harry F. Byrd, Governor of Virginia (b. 1887)
1967 - Shigeru Yoshida, Prime Minister of Japan (b. 1878)
1968 - Bud Flanagan, British wartime entertainer (b. 1896)
1972 - Harlow Shapley, American astronomer (b. 1885)
1977 - Cassie Gaines, American musician (Lynyrd Skynyrd) (b. 1948) (plane crash)
1977 - Steve Gaines, American musician (Lynyrd Skynyrd) (b. 1949) (plane crash)
1977 - Ronnie Van Zant, American musician (Lynyrd Skynyrd) (b. 1948) (plane crash)
1978 - Gunnar Nilsson, Swedish racing driver (b. 1948)
1984 - Paul Dirac, English physicist (b. 1902)
1984 - Carl Ferdinand Cori, Czech doctor, won the 1947 Nobel Prize in Physiology or Medicine (b. 1896)
1987 - Andrey Kolmogorov, Russian mathematician (b. 1903)
1989 - Anthony Quayle, English actor (b. 1913)
1994 - Sergei Bondarchuk, Russian actor and director (b. 1920)
1994 - Burt Lancaster, American actor (b. 1913)
1999 - Jack Lynch, Irish Taoiseach (b. 1917)
From 2001
2005 - Shirley Horn, American jazz pianist (b. 1934)
2005 - Andre van der Louw, Dutch politician, Mayor of Rotterdam (b. 1933)
2006 - Maxi Herber, German figure skater (b. 1920)
2008 - Soeur Emmanuelle, French-Belgian nun and humanitarian (b. 1908)
2010 - Farooq Leghari, President of Pakistan (b. 1940)
2010 - Bob Guccione, American publisher (b. 1930)
2011 - Muammar al-Gaddafi, colonel and military ruler of Libya (b. 1942)
2012 - E. Donnall Thomas, American physician and Nobel Prize winner (b. 1920)
2012 - Paul Kurtz, American academic (b. 1925)
2013 - Jovanka Broz, former First Lady of Yugoslavia (b. 1924)
2013 - Lawrence Klein, American economist (b. 1920)
2014 - Ox Baker, American wrestler and actor (b. 1938)
2014 - Oscar de la Renta, Dominican Republic fashion designer (b. 1932)
2014 - Rene Burri, Swiss photographer (b. 1933)
2014 - Pavle Merku, Slovenian composer (b. 1927)
2014 - Christophe de Margerie, French businessman (b. 1951)
2015 - Michael Meacher, English politician (b. 1939)
2015 - Cory Wells, American singer (b. 1941)
2017 - Federico Luppi, Argentine-Spanish actor (b. 1936)
2017 - Stan Kowalski, American professional wrestler (b. 1926)
2018 - Wim Kok, Prime Minister of the Netherlands (b. 1938)
2018 - Zheng Xiaosong, Chinese politician (b. 1959)
2019 - Eric Cooper, American baseball umpire (b. 1966)
2019 - Thomas D'Alesandro III, American politician (b. 1929)
2019 - Huang Yong Ping, Chinese-French avant-garde artist (b. 1954)
2019 - Aquilino Pimentel Jr., Filipino politician (b. 1933)
Observances
Kenyatta Day (Kenya)
Revolution Day (Guatemala)
Arbor Day (Czech Republic)
World Osteoporosis Day
Days of the year