On either June 10 or June 11 of 323BC (accounts vary about the exact date), Alexander the Great, the Macedonian King who literally conquered the world, died in Babylon at age 32.
Alexander defeated the Persian Empire and established the Corinthian League. Though a very young man, he had managed to unite all of Greece.
The circumstances of Alexander’s death are not conclusive: some historians wrote that he had died from complications of drinking bad wine, others speculate that he had been poisoned.
As a youth, Alexander was tutored by Aristotle, who accepted the task when Alexander’s father, Philip, who was King of Macedonia, agreed to rebuild Alexander’s hometown of Stageira (modern-day Chalkidiki region), freeing the ex-citizens who were slaves, and repopulating the town with them.
Alexander remains on the of the most significant figures in world history, almost always being featured on any such Top-10 list.