“Higher education [in the Byzantine Empire] was dispensed by the rhetor or sophist and was available in the larger cities only. The rhetor/sophist, if he held an established chair, was appointed by the local council and received a salary as well as benefitting from certain exemptions. In practice he also received payments or gifts from his pupils. If, on the other hand, he was a free-lance (and many of them were), he depended entirely on fees. There was thus an in-built competition between teachers which occasionally erupted into fights and the kidnapping of students. Boys normally took up higher education at the age of fifteen and pursued it as long as long as their circumstances or their desires dictated: a complete course took about five years, but many left after two or three. Naturally, most of the students came from well-to-do families.” – Cyril Mango, Byzantium: The Empire of New Rome