Eumenes I was a prominent figure in the ancient world, serving as the king of the Greek city-state of Pergamon from around 263 to 241 BCE. He was known for his diplomatic skills and efforts to expand his kingdom's influence, particularly during the conflicts of the Hellenistic period. Eumenes I was a supporter of the Attalid dynasty, which played a significant role in the political landscape of the time. Under Eumenes I's rule, Pergamon flourished economically and culturally. He is credited with enhancing the city's infrastructure and promoting the arts and education. His reign laid the groundwork for the future prosperity of Pergamon, which would later become a major center of culture and power in the region.