What happened on 11 May?

11 events from the Ever-When timeline, ranked by how much they mattered.

1. 330 Founding of Constantinople Constantine refounds Byzantium as the new Roman capital.
2. 1860 Expedition of the Thousand Garibaldi's red-shirts conquer Sicily and Naples for the Italian crown; classic moment of 19th-century nationalism.
3. 1998 India and Pakistan nuclear tests Both states declare themselves nuclear powers within weeks of each other.
4. 2010 David Cameron's premiership Coalition, austerity, same-sex marriage, the Scottish referendum, and the Brexit vote that ended it.
5. 1857 Delhi proclaims the last Mughal emperor The Meerut mutineers ride through the night to Delhi and hail the 81-year-old poet-king Bahadur Shah Zafar — a Company pensioner with no army of his own — as Emperor of Hindustan.
6. 1997 Deep Blue defeats Kasparov IBM's computer beats world champion Garry Kasparov, the first time a machine defeated a reigning chess champion in a match.
7. 1931 Creditanstalt fails Austria's biggest bank — a Rothschild house older than the republic — collapses, and the run leaps the border into Germany within weeks, closing every German bank by July. What had
8. 1998 Vajpayee orders the Pokhran-II nuclear tests Five underground tests in the Rajasthan desert declare India a nuclear weapons state and trigger international sanctions.
9. 1502 Fourth voyage of Columbus The 'High Voyage': barred from Hispaniola, Columbus coasts Central America hunting a strait to the Indian Ocean, loses his worm-eaten ships, and spends a final year marooned on Jam
10. 1904 Born: Salvador Dalí Spanish Surrealist painter of melting clocks and dreamlike landscapes.
11. 1918 Born: Richard Feynman American physicist of quantum electrodynamics; bongo-playing public intellectual.