Wikipedia:Selected anniversaries/July 21
July 21: National holiday of Belgium, Racial Harmony Day in Singapore.
- 356 BC – The Temple of Artemis in Ephesus, one of the Seven Wonders of the World, was destroyed in an act of arson by a man named Herostratus.
- 1831 – In Brussels, Leopold I (pictured) was inaugurated as the first King of the Belgians.
- 1861 – In the First Battle of Bull Run, the first major battle in the American Civil War, the Confederate Army under Joseph E. Johnston and P. G. T. Beauregard routed Union Army troops under Irvin McDowell.
- 1925 – Creation-evolution controversy: High school biology teacher John T. Scopes was found guilty of violating Tennessee's Butler Act by teaching evolution in class.
- 1954 – First Indochina War: The Vietnamese Demilitarized Zone was established at the Geneva Conference, partitioning Vietnam along the 17th parallel into North Vietnam led by Ho Chi Minh and South Vietnam under Emperor Bao Dai.
More events on this day... Recent days: July 20 – July 19 – July 18