626 In fear of assassination, Li Shimin ambushed and killed his rival brothers Li Yuanji and Li Jiancheng in the Incident at Xuanwu Gate.
706 Emperor Zhongzong of Tang had the remains of Emperor Gaozong of Tang, his wife and recently-deceased ruling empress Wu Zetian, her son Li Xian, her grandson Li Chongrun, and granddaughter Li Xianhui interred in a new tomb complex, the Qianling Mausoleum, located on Mount Liang.
963 The imperial army proclaimed Nicephorus Phocas to be Emperor of the Romans.
1298 The Battle of Göllheim between Albert I of Habsburg and Adolf of Nassau-Weilburg.
1489 Thomas Cranmer, Archbishop of Canterbury, was born (d. 1556).
1494 The Treaty of Tordesillas was ratified by Spain.
1555 Turgut Reis sacked Paola.
1561 Menas, Emperor of Ethiopia, defeated a revolt in Emfraz.
1582 Battle of Yamazaki: Toyotomi Hideyoshi defeated Akechi Mitsuhide.
1644 English Civil War: the Battle of Marston Moor.
1679 Europeans first visited Minnesota and saw headwaters of Mississippi in an expedition led by Daniel Greysolon de Du Luth.
1698 Thomas Savery patented the first steam engine.
1776 The Continental Congress adopted a resolution severing ties with Great Britain.
1823 Bahia Independence Day: the end of Portuguese rule in Brazil, with the final defeat of the Portuguese crown loyalists in the province of Bahia.
1871 Victor Emmanuel II entered Rome after its conquest from the Papal States.
1877 Hermann Hesse, German-born writer, Nobel laureate, was born (d. 1962).
1881 Charles J. Guiteau shot and fatally wounded U.S. President James Garfield.
1897 Italian scientist Guglielmo Marconi obtained patent for radio in London.
1900 The first zeppelin flight took place.
1903 Alec Douglas-Home, Prime Minister of the United Kingdom, was born. (d. 1995).
1903 King Olav V of Norway, was born (d. 1991).
1917 Murry Wilson, American musician and producer (The Beach Boys), was born (d. 1973).
1917 The East St. Louis Riots ended.
1929 Imelda Marcos, First Lady of the Philippines, was born.
1930 Carlos Menem, former President of Argentina, was born.
1934 Tom Springfield, British singer and songwriter (The Springfields), was born.
1934 The Night of the Long Knives ended with the death of Ernst Röhm.
1938 The electrified rail line between central Wellington and the northern suburb of Johnsonville was officially opened by Minister of Railways Dan Sullivan and Wellington Mayor Thomas Hislop.
1939 Paul Williams, American singer (The Temptations), was born (d. 1973).
1940 Indian independence leader Subhas Chandra Bose was arrested and detained in Calcutta.
1950 The Golden Pavilion at Kinkaku-ji in Kyoto burned down.
1953 Mark Hart, American musician (Crowded House and Supertramp), was born.
1954 Pete Briquette, Irish musician (The Boomtown Rats), was born.
1956 Jerry Hall, American actress and model, was born.
1962 The first Wal-Mart store opened for business in Rogers, Arkansas.
1966 French military exploded a nuclear test bomb codenamed Aldébaran in Mururoa, their first nuclear test in the Pacific.
1985 Andrei Gromyko was appointed the chairman of the Presidium of the Supreme Soviet of the Soviet Union.
1987 Nilde Iotti was named as the first female President of the Italian Chamber of Deputies.
1993 – 37 participants in an Alevi cultural and literary festival were killed when a mob of demonstrators set fire to their hotel in Sivas during a protest.
2000 Vicente Fox Quesada was elected the first President of México from an opposition party, the Partido Acción Nacional, after more than 70 years of continuous rule by the Partido Revolucionario Institucional.
2001 The AbioCor self contained artificial heart was first implanted.
2002 Steve Fossett became the first person to fly solo around the world nonstop in a balloon.
2004 ASEAN Regional Forum accepted Pakistan as its 24th member.¨
2005 – Live 8 took place in London’s Hyde Park and other locations around the world.
2008 Ingrid Betancourt, and 14 other hostages held by FARC guerrillas, are rescued by the Colombian armed forces.
2010 – The South Kivu tank truck explosion in the Democratic Republic of the Congo killed at least 230 people.
2015 – A bridge collapsed under a Pakistan Army train at Gujranwala, killing nineteen and injuring over 100
2015 – A ferry capsised in Ormoc, Leyte, Philippines, killing 62 of 220 passengers.
Sourced from NZ History Online & Wikipedia