Frederick IV | |
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Landgrave of Thuringia | |
![]() Thuringia-Meissen coat of arms | |
Born | before 30 November 1384 |
Died | Runneburg Castle, Weißensee, Thuringia | 7 May 1440
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.