- 432 Saint Patrick, aged about 16 is captured by Irish pirates from his home in Great Britain and taken as a slave to Ireland (traditional date)
- 1521 Portuguese navigator Ferdinand Magellan reaches the Philippines
- 1861 Italy is unified into a single kingdom under Victor Emmanuel II following the campaigns led by Giuseppe Garibaldi
- 1901 At a show in Paris 71 Vincent van Gogh paintings cause a sensation, 11 years after his death
- 1939 Sino-Japanese War (1937-1945): The Battle of Nanchang between the Kuomintang and the Japanese breaks out.
- 1942 Bełżec Concentration Camp opens with the transport of 30,000 Lublin Polish Jews
Rubber band patented by Stephen Perry of London
On March 17, 1845