August 6 is the 218th (two hundred and eighteenth) day of the year in the Gregorian calendar and the 219th in leap years. There are 147 days left to end the year.
953: in the monastery of San Pedro de Cardeña (Spain), Muslim troops martyr its 200 monks (who will be canonized in 1603).
1456: in the Kingdom of Hungary, the Siege of Belgrade ends with the victory of the Hungarian troops, with Serbian and Crusader support, over the Ottoman Empire of Mehmed II.
1479: in Quel (La Rioja) the Bread and Cheese Festival is founded, one of the oldest pilgrimages in Spain whose uninterrupted celebration continues today.
1538: in present-day Colombia, Gonzalo Jiménez de Quesada founded Santa Fe de Bogotá, currently the capital of the country.
1539: in present-day Colombia, Gonzalo Suárez Rendón founded Tunja, currently the capital of the department of Boyacá.
1666: in Paris (France), Molière premieres his work The Beaten Doctor.
1776: in present-day Colombia, Antonio de la Torre y Miranda founded El Carmen de Bolívar, currently the capital of Montes de María, located in the department of Bolívar.
1791; Inauguration of the Brandenburg Gate.
1792: In Paris, France, 600 chosen Republicans from Marseilles parade through the city singing a new song that will soon become a symbol of the French Revolution: La Marseillaise.
1806: Francis I of Austria decrees the abolition of the Holy Roman Empire, to prevent Napoleon Bonaparte from appropriating the title and the historical legitimacy that it entailed after his military victories.
1811: in Spain, the Courts of Cadiz decree the abolition of all jurisdictional manors.
1813: Simón Bolívar arrives in Caracas after completing the Admirable Campaign.
1824: in the battle of Junín (Peru), "the silent battle", the forces of Simón Bolívar defeat the Spanish forces commanded by José de Canterac.
1825: Simón Bolívar declares the independence of Bolivia, considered as a commemorative date for Bolivia.
1851: The first steamship, the Prince, arrives in Montevideo (Uruguay) from Southampton. Thus, the regular service between Europe and the Río de la Plata was established.
1875: on the steps of the Presidential Palace (Palacio de Carondelet), in the city of Quito (Ecuador), the re-elected president Gabriel García Moreno is assassinated.
1890: The first electric chair execution in history takes place in Auburn, New York.
1915: 240 km northeast of Warsaw (Poland), the German army attacks with chemical weapons the 70 Russian soldiers who were inside the Osovets fortress. When the 2,000 Germans entered the fortress, believing the Russians to be dead, the Russians (with their clothes bloody from the effect of the poison) counterattacked, panicking the Germans. The battle was known as "the attack of the dead men". There was no clear winner between the two sides.
1919: in the town of Milpa Alta - then a municipality in the Federal District (Mexico) - Generals Manuel Palafox, Everardo González Beltrán and Tomás García, among others, proclaim the Milpa Alta Plan.
1926: In the United Kingdom, Gertrude Ederle becomes the first woman to swim across the English Channel.
1927: in the Official Gazette of the Republic of Chile the executive decree is published that restores in that country the orthographic norms of the Royal Spanish Academy in replacement of the Bello Orthography.
1932: in Venice (Italy) the first cinema exhibition is inaugurated.
1934: in Haiti, US troops withdraw from the island, which they had occupied since 1915. (They had been bloodily invaded by orders of US President Woodrow Wilson).
1945: in Hiroshima (Japan), the United States carries out the first atomic bombing in history, becoming the only country in the world in human history that has used atomic power.