# Johannes Praetorius

> German astronomer and mathematician (1537-1616)

**Wikidata**: [Q91661](https://www.wikidata.org/wiki/Q91661)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Johannes_Praetorius)  
**Source**: https://4ort.xyz/entity/johannes-praetorius-q91661-2


## References

1. [The Fine Art Archive](https://cs.isabart.org/person/115255)
2. Integrated Authority File
3. Mathematics Genealogy Project
4. International Standard Name Identifier
5. Virtual International Authority File
6. [Source](https://kalliope-verbund.info/DE-611-BF-8860)
7. SNAC
8. BnF authorities
9. Freebase Data Dumps. 2013