Princess Katarzyna Ostrogska (, ) (1560–1579) was a Ruthenian noblewoman. She was famed for the Siege of Dubna in 1577, which was sieged by nomads with the purpose of take to her prisoner. She married Krzysztof Mikołaj Radziwiłł on 22 July 1578 in Dubno. See also House of Ostrogski List of szlachta External links "Ostrozky", Liubomyr Vynar, Encyclopedia of Ukraine, vol. 3 (1993) Ostrogski family 1560 births 1579 deaths Kateryna 1560 Polish–Lithuanian Commonwealth people