# Johannes II van Keulen

> Dutch scientific instrument maker

**Wikidata**: [Q31209938](https://www.wikidata.org/wiki/Q31209938)  
**Source**: https://4ort.xyz/entity/johannes-ii-van-keulen


## References

1. BnF authorities
2. ECARTICO
3. Repertorium van Nederlandse kaartmakers
4. Virtual International Authority File
5. [Geographicus Rare Antique Maps biographical dictionary of cartographers](https://www.geographicus.com/P/RareMaps/vankeulenjohannesii)
6. Scientific Instrument Makers in the Netherlands
7. NMVW-collection website
8. [1753](https://n2t.net/ark:/33862/collect/725364)
9. CollectieGelderland