# Vratislaus I, Duke of Bohemia

> Duke of Bohemia

**Wikidata**: [Q552696](https://www.wikidata.org/wiki/Q552696)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Vratislaus_I,_Duke_of_Bohemia)  
**Source**: https://4ort.xyz/entity/vratislaus-i-duke-of-bohemia


## References

1. Integrated Authority File
2. The Peerage
3. Virtual International Authority File
4. Freebase Data Dumps. 2013
5. Sejm-Wielki.pl