Portal:Germany/Anniversaries/April/April 3
- 1827 - Death of physicist Ernst Chladni, known for the Chladni patterns
- 1833 - The Frankfurter Wachensturm fails
- 1892 - Birth of mathematician Hans Rademacher
- 1885 - Gottlieb Daimler is granted a patent for his engine design.
- 1897 - Death of Romantic composer Johannes Brahms