# Duchy of Prussia

> historical state (1525–1701)

**Wikidata**: [Q153091](https://www.wikidata.org/wiki/Q153091)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Duchy_of_Prussia)  
**Source**: https://4ort.xyz/entity/duchy-of-prussia


## References

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