Dionysius II was a ruler of the ancient Greek city-state of Syracuse in Sicily. He became tyrant around 367 BC, following the death of his father, Dionysius I, who was known for his oppressive rule. Dionysius II's reign was marked by political instability and challenges from rival factions, leading to his eventual exile. Despite his initial power, Dionysius II struggled to maintain control and was often seen as a less effective leader than his father. He attempted to restore his authority but faced numerous conflicts, including the rise of the philosopher Plato, who had a significant influence on his thinking and governance.