German mathematician Carl Friedrich Gauss constructed the first heptadecagon using a ruler and a compass.
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Vincent van Gogh's famous painting 'Sunflowers' was sold for an incredible $39.7 million, the most ever paid for a painting.
The Dalai Lama received political asylum in India after fleeing from China.
The United States bought Alaska from the Russian Empire.
The US adopted the 15th Amendment, guaranteeing citizens the right to vote.
Ether was used as an anesthetic for the first time, by American surgeon Crawford Long, in Athens, Georgia.
