[1] 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.

[2] Ostrogski was sent then to the Sloboda Ukraine to fight Tatars, but managed to escape and returned to Lithuania in 1507.

[3] According to the Book of Knowledge of All Kingdoms, the coat of arms for country of Roxia (Ruthenia) was described as a green field with an octagonal star, while its banner consists of two golden half-moons at a silver field pointing with their horns at each other.