20 July 1849 : Start of 1st Lancashire-Yorkshire clash at Hyde Park, Sheffield
20 July 1847 : German astronomer Theodor discovers Comet Brorsen-Metcalf
20 July 1836 : Charles Darwin climbs Green Hill on Ascension
20 July 1810 : Colombia declares independence from Spain
20 July 1808 : Napoleon decrees all French Jews adopt family names
20 July 1801 : Elisha Brown Jr pressed a 1,235 pound cheese ball at his farm
20 July 1773 : Scottish settlers arrive at Pictou, Nova Scotia (Canada)
20 July 1749 : Earl of Chesterfield says "Idleness is only refuge of weak minds"
20 July 1654 : Anglo-Portuguese treaty, Portugal comes under English control
20 July 1619 : Gerardus Vossius resigns as Dutch regent States college leader
20 July 1609 : Emperor Rudolf II grants Silezische protestants freedom of religion
20 July 1608 : Reynier van Oldenbarnevelt marries Anna Weytzen in Delft
20 July 1553 : Prime Minister John Dudley captured in Cambridge
20 July 1498 : Emperor Maximilian names Albrecht Governor of the Netherlands
20 July 1495 : French Viceroy of Naples Montpensier surrenders