# Paul Knüpfer

> German opera singer

**Wikidata**: [Q20817369](https://www.wikidata.org/wiki/Q20817369)  
**Source**: https://4ort.xyz/entity/paul-kn-pfer


## References

1. Integrated Authority File
2. museum-digital
3. MusicBrainz
4. filmportal.de
5. National Library of Israel Names and Subjects Authority File