Traditional Ostrogski coat of arms was described in his work Kasper Niesiecki, while its iconographic representation is seen on the Ostroh Bible. According to Niesiecki the first (oldest) Ostrogski coat of arms was Pogoń Ruska coat of arms where the Saint George pierces a dragon (see Saint George and the Dragon). During the Battle of Vedrosha on 14 July 1500 the Grand Hetman of Lithuania Konstanty Ostrogski was taken a prisoner by the Muscovite forces and later sent to Vologda. Nikolay Karamzin cites that on 18 October 1506 Ostrogski pledged his allegiance to the Grand Prince of Moscow Vasili III as a boyar, confirmed by the Metropolitan of Moscow Simon. Ostrogski was sent then to the Sloboda Ukraine to fight Tatars, but managed to escape and returned to Lithuania in 1507.