Portal:Germany/Anniversaries/April/April 4
- 1785 - Birth of writer Bettina von Arnim
- 1854 - Johann Wolfgang von Goethe's closet drama Faust, Part 2 premieres in Hamburg
- 1870 - Death of scientist Heinrich Gustav Magnus
- 1932 - Death of chemist Wilhelm Ostwald, recipient of the 1909 Nobel Prize in Chemistry
- 1981 - Death of mathematician Carl Ludwig Siegel