SortStack #1122 — 2029-07-05

By year · Order from earliest to most recent.

1. Emperor Constantine dedicates Constantinople as the new Roman capital 330

   Built on the old Greek city of Byzantium, it remained an imperial capital for over a thousand years and is now Istanbul, Turkey's largest city.

2. Charlemagne is crowned Emperor of the Romans in St. Peter's Basilica 800

   Pope Leo III crowned him on Christmas Day, reportedly taking Charlemagne by surprise — reviving the idea of a Roman emperor in the west after three centuries.

3. The Aztecs found Tenochtitlan on an island in a lake 1325

   Legend says they built where an eagle perched on a cactus eating a snake — the image now at the center of Mexico's flag. Mexico City stands on the drained lakebed.

4. The world's first public steam railway opens between Stockton and Darlington 1825

   George Stephenson's engine Locomotion No. 1 pulled the opening train. A man on horseback rode ahead waving a flag — the train soon outpaced him.

5. Germany invades Poland, beginning the Second World War 1939

   Britain and France declared war two days later — then months of eerie quiet followed on the Western Front, a period nicknamed the 'Phoney War.'

6. DeepMind's AlphaGo defeats Go champion Lee Sedol 2016

   AlphaGo's 'Move 37' was so alien that commentators assumed it was a mistake. Lee won a single game back with a move fans dubbed 'God's touch.'

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