Alexander the Great was born in Pella, Macedonia to King Philip II of Macedon and Olympias. He ascended to the Macedonian throne in 336 BC after his father was assassinated. In just 10 years, Alexander built one of the largest empires in the ancient world by conquering Persia and territories as far as modern-day India. However, his grand plans for further expansion were cut short by his death at age 33 in 323 BC, likely due to illness.