Marie and Pierre Curie isolate radium in Paris, France.
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The Paris Peace Conference began in France.
Riots broke out in Paris, France, after two Muslim teenagers were electrocuted trying to evade police.
Digging began to make way for the construction of the Eiffel Tower, Paris.
Hitler had his first and only tour of Paris, ticking Eiffel Tower and Napoleon's grave off his bucket list.
Doctors Without Borders was founded in Paris by French doctors and journalists.
