# Berthold IV, Duke of Merania

> Duke of Merania and Margrave of Istria

**Wikidata**: [Q61454](https://www.wikidata.org/wiki/Q61454)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Berthold,_Duke_of_Merania)  
**Source**: https://4ort.xyz/entity/berthold-iv-duke-of-merania


## References

1. Integrated Authority File
2. Union List of Artist Names. 2015
3. [Source](http://viaf.org/viaf/data/viaf-20170101-links.txt.gz)
4. Virtual International Authority File
5. Freebase Data Dumps. 2013
6. CERL Thesaurus
7. Sejm-Wielki.pl