# Leopold Anton Virgil Maria zu Firmian
**Wikidata**: [Q55849897](https://www.wikidata.org/wiki/Q55849897)  
**Source**: https://4ort.xyz/entity/leopold-anton-virgil-maria-zu-firmian


## References

1. Czech National Authority Database
2. Genealogics
3. Catalog of the German National Library
4. Deutsche Biographie