Planian was formerly part of the German Empire. In the German Empire, the place was called Plaňany.
The place is now called Plaňany and belongs to Czechoslovakia.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Plaňan | Austro-Hungary | Kolin | before the Treaty of Saint-Germain |
| Plaňany | Austro-Hungary | Kolin | before the Treaty of Saint-Germain |
| Plaňany | Czechoslovakia | Kolín | after the Treaty of Saint-Germain |
| Planian | German Empire | Kolin | 1939 |
| Plaňany | German Empire | Kolin | 1939 |
| Plaňany | Czechoslovakia | Kolín | 1945 |
| Plaňany | Czechoslovakia | Střední Čechy | 1992 |