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When did Aristotle become Alexander the Great’s tutor?

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Marble bust of Aristotle with a beard and draped robe, showing detailed facial features and wavy hair, set against a dark background. — Aristotle Aristotle, detail of a Roman copy (2nd century bce) of a Greek alabaster portrait bust (c. 325 bce); in the Museo Nazionale Romano, Rome.

In 343 or 342 BCE, Aristotle was summoned by Philip II to the Macedonian capital at Pella to serve as tutor to his 13-year-old son, the future Alexander the Great.12