# Jan III of Oświęcim

> Polish duke

**Wikidata**: [Q639170](https://www.wikidata.org/wiki/Q639170)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Jan_III_of_Oświęcim)  
**Source**: https://4ort.xyz/entity/jan-iii-of-o-wi-cim


## References

1. Silesia in the History of the Czech State I. From Prehistory to 1490
2. Silesia. Unknown country of the Czech Crown. Princely and Estates Silesia until 1740
3. Freebase Data Dumps. 2013