# Frederick IV

> Landgrave of Thuringia, Margrave of Meissen

**Wikidata**: [Q314549](https://www.wikidata.org/wiki/Q314549)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Frederick_IV,_Landgrave_of_Thuringia)  
**Source**: https://4ort.xyz/entity/frederick-iv-q314549


## References

1. Integrated Authority File
2. The Peerage
3. Catalog of the German National Library
4. Freebase Data Dumps. 2013
5. Sächsische Biografie
6. CERL Thesaurus
7. Sejm-Wielki.pl