# Understen old lighthouse

> lighthouse on Understen in Norrtälje Municipality, Sweden

**Wikidata**: [Q33110051](https://www.wikidata.org/wiki/Q33110051)  
**Source**: https://4ort.xyz/entity/understen-old-lighthouse


## References

1. [Bebyggelseregistret](http://kulturarvsdata.se/raa/bbrb/21420000029894)
2. [Fyrwiki](https://fyr.org/wiki/index.php/Understen)