After sacking the city of Thebes, Alexander was awarded the generalship of Greece. His father Philip was assassinated in 336 BC at the wedding of Cleopatra of Macedon, Alexander's sister, and Alexander assumed the throne of the Kingdom of Macedon. Alexander on a mosaic from Pompeii, an alleged reproduction of a Philoxenus of Eretria or Apelles' painting, 4th century BC.ĭuring his youth, Alexander was tutored by Aristotle until the age of 16.