# Portrait of Isaac Massa

> painting by Frans Hals, San Diego Museum of Art

**Wikidata**: [Q17865722](https://www.wikidata.org/wiki/Q17865722)  
**Source**: https://4ort.xyz/entity/portrait-of-isaac-massa


## References

1. RKDimages
2. [Source](https://rkd.nl/images/218789)
3. [A family's 70-year quest to regain treasures stolen by Nazis](https://www.lootedart.com/news.php?r=QHWTSO354201)
4. [Source](http://archive.org/stream/catalogueraisonn03hofsuoft#page/61/mode/1up)
5. [Source](https://archive.org/stream/franshalsdesmeis00valeuoft#page/129)
6. [Source](https://digi.ub.uni-heidelberg.de/diglit/valentiner1921/0184/image,info)
7. [Source](https://archive.org/details/catalogusvanschi00kuns/page/9/mode/1up)
8. [Source](https://archive.org/details/catalogusvanschi00kuns/page/3/mode/1up)
9. Frans Hals catalog raisonné, 1974