The Aristotle University of Thessaloniki (A.U.Th.; often called the Aristotelian University or University of Thessaloniki; Greek: Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης) is the sixth oldest and among the most highly ranked tertiary education institutions in Greece. It is named after the philosopher Aristotle, who was born in Stageira, about 55 km east of Thessaloniki.