# Friedrich Haagen

> German historian (1806-1879)

**Wikidata**: [Q1459451](https://www.wikidata.org/wiki/Q1459451)  
**Source**: https://4ort.xyz/entity/friedrich-haagen


## References

1. Integrated Authority File
2. International Standard Name Identifier
3. Virtual International Authority File
4. CERL Thesaurus