# A Rock in a Calm Sea

> painting by Jacob de Gruyter

**Wikidata**: [Q50868326](https://www.wikidata.org/wiki/Q50868326)  
**Source**: https://4ort.xyz/entity/a-rock-in-a-calm-sea


## References

1. [Source](http://collections.rmg.co.uk/collections/objects/12344)
2. [Source](https://rkd.nl/explore/images/37300)