King Seleucus I was a prominent figure in ancient history, known for founding the Seleucid Empire after the death of Alexander the Great in 323 BCE. He was originally a general under Alexander and played a crucial role in the division of Alexander's vast empire. Seleucus established his rule over a large territory that included parts of modern-day Turkey, Syria, and Iran. His reign lasted from 305 BCE until his death in 281 BCE. Seleucus I is recognized for promoting Hellenistic culture and establishing cities, such as Antioch, which became significant cultural and economic centers. His legacy continued through his descendants, who ruled the Seleucid Empire for several generations.