Commemorative coin of 20 Hryvnias denomination is dedicated to the city-state Olviya, one of the most important centers of ancient material and spiritual culture of Northern and North-Western Region of Black Sea coast, which was founded at the beginning of 6th century B.C. at the Lower Bough region (now it is the site of ancient settlement near village Parutino, Mykolayiv region) and existed for about 1000 years. There was in the city quite original coin production, manufacturing cast copper dolphin-figures and arrows, which served as legal tender. In circulation since December 26, 2000.