# Jan Słupecki
**Wikidata**: [Q96210564](https://www.wikidata.org/wiki/Q96210564)  
**Source**: https://4ort.xyz/entity/jan-s-upecki


## References

1. Catalog of the German National Library
2. Sejm-Wielki.pl
3. [Source](https://www.ipsb.nina.gov.pl/a/biografia/jan-slupecki-h-rawa)