Sir Robert Baden-Powell established the Boys Scouts in England.
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Renegades of the Abbasid Caliphate captured Thessalonica, which is modern-day Thessaloniki, Greece.
Arc de Triomphe in Paris became the world's largest triumphal arch at 164 ft tall.
Lance Armstrong won the Tour de France for the third time in a row.
Lil Nas X's 'Old Town Road' single reached a new record for the longest time on the Billboard charts after spending 17 weeks at number one.
Prince Charles and Lady Diana Spencer got married at St. Paul's Cathedral in London.
