Frederick IV, Landgrave of Thuringia
Frederick IV | |
|---|---|
| Landgrave of Thuringia | |
Thuringia-Meissen coat of arms | |
| Born | before 30 November 1384 |
| Died | 7 May 1440 Runneburg Castle, Weißensee, Thuringia |
| Noble family | House of Wettin |
| Spouse(s) | Anna of Schwarzburg-Blankenburg |
| Father | Balthasar, Landgrave of Thuringia |
| Mother | Margaret of Nuremberg |
Frederick IV (before 30 November 1384 – 7 May 1440), nicknamed the Peaceful (German: Friedrich der Friedfertige) or the Simple (der Einfältige), was a member of the House of Wettin and Margrave of Meissen who ruled as the last independent Landgrave of Thuringia from 1406 until his death.