The Lumière brothers hold a paid public film screening at the Grand Café in Paris, often regarded as the birth of cinema.
Wilhelm Röntgen discovers X-rays at Würzburg, opening the era of medical imaging.
The first Summer Olympics of the modern era are held in Athens, organised by the International Olympic Committee.
Marie and Pierre Curie discover two new radioactive elements, polonium and radium, advancing the study of radioactivity.
The Post-Impressionist painter Vincent van Gogh dies at Auvers-sur-Oise, France, little recognised in his lifetime.
Max Planck presents the hypothesis that energy is emitted in discrete quanta, marking the birth of quantum physics.
Adolf Hitler, later dictator of Nazi Germany, is born in Braunau am Inn, Austria.