# Helfenberg Castle

> castle ruins in Hüttwilen in the canton of Thurgau, Switzerland

**Wikidata**: [Q1012279](https://www.wikidata.org/wiki/Q1012279)  
**Source**: https://4ort.xyz/entity/helfenberg-castle


## References

1. Swiss Inventory of Cultural Property of Regional Significance, February 2017
2. Swiss PCP Inventory 2021
3. Swiss PCP Inventory 2023
4. Burgenwelt