# Schwalbe II

> Planned underground hydrogenation plant in Germany

**Wikidata**: [Q1644574](https://www.wikidata.org/wiki/Q1644574)  
**Source**: https://4ort.xyz/entity/schwalbe-ii


## References

1. Encyclopedia of Camps and Ghettos, 1933-1945
2. Der Ort des Terrors. 2017