# Karl Freiherr von Hirschberg
**Wikidata**: [Q55852345](https://www.wikidata.org/wiki/Q55852345)  
**Source**: https://4ort.xyz/entity/karl-freiherr-von-hirschberg


## References

1. Integrated Authority File
2. Genealogics
3. Catalog of the German National Library
4. Deutsche Biographie