1441: During the Council of Florence, Pope Eugenius IV issues the bull "Etsi non dubitemus," which asserts the superiority of the pope over the Councils
1775: British begin siege of Boston As a result, New York adopts new constitution as an independent state
1782: Netherlands recognizes US
1902: Marie Curie isolate radioactive element radium
1929: The first Italian parliament made up completely from Mussolinis Fascists opens
1945: Soviet troops enter Berlin
1961: Revolt in the South African country of Angola
