1921
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| Centuries: | 19th century - 20th century - 21st century |
| Decades: | 1890s 1900s 1910s - 1920s - 1930s 1940s 1950s |
| Years: | 1918 1919 1920 - 1921 - 1922 1923 1924 |
Events
- Albert Einstein receives the Nobel Prize in Physics.
