# Jan Josef z Vrtby

> Czech nobleman

**Wikidata**: [Q12022629](https://www.wikidata.org/wiki/Q12022629)  
**Source**: https://4ort.xyz/entity/jan-josef-z-vrtby


## References

1. Catalog of the German National Library
2. CERL Thesaurus
3. Wrtby, Johann Joseph Graf (BLKÖ)
4. Czech National Authority Database
5. Virtual International Authority File
6. Bibliography of the History of the Czech Lands