# Royal Prussia

> autonomous dependency/protectorate of the Kingdom of Poland (1466–1569)

**Wikidata**: [Q589662](https://www.wikidata.org/wiki/Q589662)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Royal_Prussia)  
**Source**: https://4ort.xyz/entity/royal-prussia


## References

1. Freebase Data Dumps. 2013
2. Czech National Authority Database
3. FactGrid