Русь refers to a historical region and cultural entity in Eastern Europe, primarily associated with the early medieval state known as Kievan Rus. This state emerged in the 9th century and played a significant role in the development of Ukrainian, Belarusian, and Russian identities. The term "Русь" is often linked to the Varangians, a group of Norse traders and warriors who settled in the area. The influence of Русь extended beyond politics, impacting religion, language, and culture. The adoption of Christianity in 988 significantly shaped the region's cultural landscape. Today, Русь is recognized as a foundational element in the history of Eastern Slavic nations.