# Three-age system

> system for categorizing prehistory

**Wikidata**: [Q475234](https://www.wikidata.org/wiki/Q475234)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Three-age_system)  
**Source**: https://4ort.xyz/entity/three-age-system


## References

1. [Source](https://lingualibre.org/wiki/Q769409)
2. Freebase Data Dumps. 2013