# Ioannovsky Ravelin
**Wikidata**: [Q4202549](https://www.wikidata.org/wiki/Q4202549)  
**Source**: https://4ort.xyz/entity/ioannovsky-ravelin


## References

1. [Source](https://ru-monuments.toolforge.org/wikivoyage.php?id=7810390041)
2. [Source](http://docs.cntd.ru/document/901793811)