August 6 in history

daily history, August 6.
August 6, 258 AD : Pope St Sixtus II beheaded in Rome, under persecutions by Roman Emperor Valerian.
August 6, 1497: Italian explorer John Cabot returns to Bristol from North America, probably first European to do so after the Vikings.
August 6, 1661: The Treaty of The Hague is signed, the Dutch Republic sells New Holland, for 63 tonnes of gold to Portugal.
August 6, 1806: Holy Roman Empire ends, it was neither holy, Roman, nor an empire. Francis II renounces the title, becoming Emperor of Austria.
August 6, 1825: Bolivia gains independence from Spain (National day of Bolivia).
August 6, 1890: At Auburn Prison in New York, murderer William Kemmler becomes the 1st person to be executed by electric chair.
August 6, 1896: French parliament voted to annex Madagascar.
August 6, 1914: WWI, Austria-Hungary declares war on Russia, and Serbia declares war against Germany.
August 6, 1932: 1st Venice Film Festival opens, the world's oldest film festival.
August 6, 1940: Estonia is annexed into Soviet union.
August 6, 1945: Atomic bomb dropped on the Japanese city of Hiroshima by the US B-29 Superfortress "Enola Gay".
August 6, 1962: Jamaica becomes independent after 300 years of British rule.