Galen (129 - to c.205 AD) was from the city of Pergamum in Asia Minor. Once he had decided to be a doctor he travelled widely in search of learning before returning to Pergamum to patch up wounded gladiators. Arrogant and ambitious, he makes his way to the competitive atmosphere of Rome where through sheer persistence he ends up serving the imperial family. Applying philosophical principles to his practice, he left a vast array of writings. These became authoritative and Galenic medicine was prominent in the Renaissance and even beyond. Yet his authority was gradually eroded by scholars such as Vesalius who spotted the inaccuracies in his dissections. Fierce battles over his authority followed.