| 1916 | Europe • Germany | Albert Einstein proposes the General Theory of Relativity. |
| 1917 | Europe • France | Marcel Duchamp exhibits his surrealist work The Fountain using a upturned urinal. |
| 1919 | Europe • Germany
| Walter Gropius founds the Bauhaus school of design. |
| 1919 | Europe • France | The French film director Abel Gance (1889-1981) releases the anti-war film J'accuse!. In it he uses wounded actors to portray the ghosts of fallen men. In 1924 John Heartfield created the photomontage After ten years: fathers and sons in which he uses skeletons and marching soldiers to depict the futility of war. |
| 1922 | North America • USA | Hollywood's first Technicolor film Toll of the Sea is released. |
| 1922 | Africa • Egypt | The tomb of King Tutankhamen is discovered by Howard Carter. |
| 1924 | Europe • France | André Breton (1896–1966) publishes the first Surrealist manifesto |
| 1924 | North America • USA | AT&T sends photographs over a wire. (20 May 1924) |
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