# Theodor Spieß
**Wikidata**: [Q94762272](https://www.wikidata.org/wiki/Q94762272)  
**Source**: https://4ort.xyz/entity/theodor-spie-


## References

1. Catalog of the German National Library
2. RKDartists
3. Benezit Dictionary of Artists
4. [Source](https://hedendaagsesieraden.nl/2019/09/17/max-joseph-gradl/)