# Walter Koeppen
**Wikidata**: [Q111819978](https://www.wikidata.org/wiki/Q111819978)  
**Source**: https://4ort.xyz/entity/walter-koeppen


## References

1. archINFORM
2. [Source](https://doi.org/10.25645/pr99-syem)
3. Berlin cultural heritage database
4. [archINFORM](https://www.archinform.net/service/wd_aiarch.php)