Example image of eyePlorer eyePlorer map for 'December 21': Midsummer Northern Hemisphere Southern Hemisphere Winter solstice 69 Galba Otho Roman Emperor Vespasian Vitellius Year of the Four Emperors 1140 Conrad III of Germany Siege of Weinsberg 1598 Biobío River Cacique Captaincy General of Chile Destruction of Seven Cities Disaster of Curalaba Mapuche Occupation of Araucanía Pelantaro Spanish Empire 1620 Mayflower Pilgrim Plymouth Colony Plymouth Rock Plymouth, Massachusetts William Bradford (Plymouth governor) 1844 Cooperative History of the cooperative movement Rochdale Rochdale Pioneers 1861 Abraham Lincoln Medal of Honor President of the United States 1872 Challenger expedition George Nares HMS Challenger (1858) Portsmouth 1883 Royal Canadian Dragoons The Royal Canadian Regiment 1913 Arthur Wynne