April 20th in History
April 20th
1290 A Round Table tournament is held near Winchester, England, in imitation of King Arthur, to commemorate the betrothal of the daughter of Edward I, attended by the king.
1535 Stockholm experiences the atmospheric optical phenomenon called a Sun Dog or parhelion over the city, prompting omens against King Gustav Vasa
https://ownyourweather.com/what-is-a-sundog/
1736 French mathematician Pierre Louis Maupertuis begins his Lapland expedition to measure latitude and the shape of the earth, joined by fellow scientists Anders Celsius, Charles Etienne Louis Camus, Alexis Clairaut, and Pierre-Charles Le Monnier
1902 Marie and Pierre Curie isolate the radioactive compound radium chloride.
1916 - Sir Roger Casement landed in Ireland to incite rebellion against the British. Casement, a British diplomat, was captured within hours and was hanged for high treason on August 3.
1919 In an ongoing dispute over the possession of Vilnius, Polish forces drove out Russia's Red Army—which had previously ousted the newly established Lithuanian government—and occupied the city.
1964www.beautifulbritain.co.ukBBC Two launched, with a power cut because of a fire at Battersea Power Station.
1968 – Heavy metal pioneers Deep Purple billed as Roundabout played their first ever live gig at a music venue in Copenhagen, Denmark.
1290 A Round Table tournament is held near Winchester, England, in imitation of King Arthur, to commemorate the betrothal of the daughter of Edward I, attended by the king.
1535 Stockholm experiences the atmospheric optical phenomenon called a Sun Dog or parhelion over the city, prompting omens against King Gustav Vasa
https://ownyourweather.com/what-is-a-sundog/
1736 French mathematician Pierre Louis Maupertuis begins his Lapland expedition to measure latitude and the shape of the earth, joined by fellow scientists Anders Celsius, Charles Etienne Louis Camus, Alexis Clairaut, and Pierre-Charles Le Monnier
1902 Marie and Pierre Curie isolate the radioactive compound radium chloride.
1916 - Sir Roger Casement landed in Ireland to incite rebellion against the British. Casement, a British diplomat, was captured within hours and was hanged for high treason on August 3.
1919 In an ongoing dispute over the possession of Vilnius, Polish forces drove out Russia's Red Army—which had previously ousted the newly established Lithuanian government—and occupied the city.
1964www.beautifulbritain.co.ukBBC Two launched, with a power cut because of a fire at Battersea Power Station.
1968 – Heavy metal pioneers Deep Purple billed as Roundabout played their first ever live gig at a music venue in Copenhagen, Denmark.
61-69, M
