1999 Ukraine 10 Hryvnias Proof. .925 silver , 31.1g, 38.61mm, Rim incised, Mintage 10,000. Dmytro Vyshnevetsky, the orthodox Prince and Cossack's military leader, who in 1556 built a fortress at the Dnipro River island of Mala Khortytsya and founded Zaporizhya Sich. Part of the Heroes of the Cossack Age series.