# Heinrich Johann Hansen

> Baltic German historian (1819-1900)

**Wikidata**: [Q55089769](https://www.wikidata.org/wiki/Q55089769)  
**Source**: https://4ort.xyz/entity/heinrich-johann-hansen


## References

1. Catalog of the German National Library
2. Baltisches biografisches Lexikon digital
3. CERL Thesaurus
4. MAK
5. Virtual International Authority File