# Hieronymus Gratzmüller
**Wikidata**: [Q55134375](https://www.wikidata.org/wiki/Q55134375)  
**Source**: https://4ort.xyz/entity/hieronymus-gratzm-ller


## References

1. Integrated Authority File
2. Catalog of the German National Library
3. [Source](https://www.deutsche-biographie.de/sfz23527.html)
4. Répertoire International des Sources Musicales
5. IdRef