# Zaccarias Janssen

> Dutch spectacle maker and microscope inventor

**Wikidata**: [Q139518](https://www.wikidata.org/wiki/Q139518)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Zacharias_Janssen)  
**Source**: https://4ort.xyz/entity/zaccarias-janssen


## References

1. ECARTICO
2. Integrated Authority File
3. [Source](https://www.aps.org/publications/apsnews/200403/history.cfm)
4. Encyclopædia Britannica Online
5. Czech National Authority Database
6. Virtual International Authority File
7. Biografisch Portaal
8. Deutsche Biographie
9. Freebase Data Dumps. 2013
10. Library of Congress Control Number