Dionysius the Elder was a Greek tyrant who ruled the city-state of Syracuse in Sicily from 405 to 367 BCE. He is known for his military prowess and efforts to expand his territory, making Syracuse a significant power in the Mediterranean. His reign was marked by both cultural achievements and political repression. Dionysius was also a patron of the arts and philosophy, attracting notable figures like the philosopher Plato. He established a strong naval force and fortified the city, which helped protect it from external threats. His legacy includes both his contributions to Syracuse and the complex nature of his rule.