Nestled in the rolling foothills of the Carpathian Mountains lies a verdant landscape dotted with evergreens and medieval cities. It’s a region that has seen many people come and go. Ancient Greeks, Romans, Byzantines, Goths, and Huns all have claimed and lost pockets of land there. In the ninth century, Scandinavian Vikings, known as the Rus, established one of medieval Europe’s most powerful states there. Centuries later, a Rus descendant, Prince Roman of Volhynia and his son, pulled a new kingdom from its ashes: Galicia. In the late-18th century, that…