Gleb Svyatoslavich was a 12th-century prince of the Kievan Rus', known for his role in the political landscape of Eastern Europe. He was the son of Svyatoslav I of Kiev and a member of the Rurik dynasty, which played a significant role in the region's history. Gleb ruled over the principality of Chernigov and was involved in various conflicts and alliances with other princes. Gleb is often remembered for his piety and dedication to the Orthodox Christian faith. He was canonized as a saint in the Eastern Orthodox Church, reflecting his reputation for virtue and leadership. His life and legacy are significant in the context of the early medieval history of Russia and Ukraine.