Alexander III of Macedon, better known as Alexander the Great, was a king of the ancient Greek kingdom of Macedon and a member of the Argead dynasty. Tutored by the philosopher Aristotle, Alexander became one of history's most successful military commanders, never losing a battle despite being outnumbered in many. By the age of 30, he had created one of the largest empires of the ancient world, stretching from Greece to northwestern India. His most significant legacy was not just his conquest of the Persian Empire, but the 'Hellenization' of the regions he conquered. He founded more than twenty cities that bore his name, most notably Alexandria in Egypt. This cultural diffusion led to the Hellenistic period, where Greek culture, language, and thought blended with Eastern influences, shaping the Mediterranean and Middle East for centuries.