Mikołaj Sieniawski was a Polish magnate, military commander and a prominent politician of his times. He built stone Brzeżany Castle round which the modern town of Berezhany has developed.
- Occupation
- politician, diplomat
- Position held
- Great Hetman of the Crown, Q9377073, Russian voivode, field crown hetman
- Citizenship
- Kingdom of Poland
- Born
- 1489
- Died
- February 2, 1569, February 21, 1569
