# city walls of Old San Juan

> historic defensive walls in Puerto Rico

**Wikidata**: [Q52063661](https://www.wikidata.org/wiki/Q52063661)  
**Source**: https://4ort.xyz/entity/city-walls-of-old-san-juan


## References

1. NRHP nomination: San Juan National Historic Site
2. 44 FR 7416
3. NRHP nomination: Zona Histórica de San Juan
4. NRHP nomination: Old San Juan Historic District
5. [Source](http://whc.unesco.org/en/list/266)