1820 in History
January 12 Royal Astronomical Society founded in England
January 30 Edward Bransfield aboard Williams discovers Antarctica (UK claim)
February 6 1st organized emigration of blacks back to Africa (New York to Sierra Leone)
February 6 U.S. population announced at 9,638,453 (1,771,656 blacks (18.4%))
February 23 Cato Street conspiracy uncovered
March 3 Missouri Compromise passes, allowing slavery in Missouri
March 5 Dutch city of Leeuwarden forbids Jews to go to synagogues on Sundays
March 9 James Monroe's daughter Maria marries in the White House
March 9 Philippines chases out foreigners; about 125 die
March 15 Maine admitted as 23rd state
March 25 Greece freedom revolt against anti Ottoman attack
May 13 Opera "Die Jagarsbraut" is completed
June 28 Tomato is proven non-poisonous
July 1 1st edition of newspaper "Courrier de la Meuse" published"
August 7 1st potatoes planted in Hawaii
August 14 1st U.S. eye hospital, the New York Eye Infirmary, opens in New York City
October 9 Guayaquil, Ecuador declares its freedom from Ecuador
October 20 Spain sells part of Florida to U.S. for $5 million
November 3 Cuenca Ecuador declares independence
November 7 James Monroe elected 5th U.S. president
November 17 Antarctica discovered by Nathaniel B. Palmer on the 'Hero', a 47 foot sloop
December 6 U.S. president James Monroe re-elected
December 15 1st General pharmacopoeia in U.S. published, Boston
December 20 Missouri imposes a $1 bachelor tax on unmarried men between 21 and 50