Olschan was formerly part of the German Empire. In the German Empire, the place was called Olšany.
The place is now called Olšany u Prostějova and belongs to Czechoslovakia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Olschan | Austro-Hungary | Proßnitz | before the Treaty of Saint-Germain |
| Olšany | Austro-Hungary | Proßnitz | before the Treaty of Saint-Germain |
| Olšany | Czechoslovakia | Prostějov | after the Treaty of Saint-Germain |
| Olschan | German Empire | Proßnitz | 1939 |
| Olšany | German Empire | Proßnitz | 1939 |
| Olšany | Czechoslovakia | Prostějov | 1945 |
| Olšany u Prostějova | Czechoslovakia | Jižní Morava | 1992 |