On this day in 1863, the London Underground, the world's oldest underground railway, opened between London Paddington station and Farringdon station.
On this day in 1920, the Treaty of Versailles took effect, officially ending World War I.
On this day in 1929, The Adventures of Tintin, one of the most popular European comic books, was first published in Belgium.
And on this day in 1946, the first General Assembly of the United Nations opened in London. Fifty-one nations were represented.