# Leszek, Duke of Masovia

> Polish noble

**Wikidata**: [Q3228728](https://www.wikidata.org/wiki/Q3228728)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Leszek,_Duke_of_Masovia)  
**Source**: https://4ort.xyz/entity/leszek-duke-of-masovia


## References

1. Freebase Data Dumps. 2013
2. Sejm-Wielki.pl