The ruins of Ephesus is one of the world’s greatest archaeological sites. It is located 75 km south of Izmir.In Hellenistic times, Ephesus became the most densely populated city in Anatolia with a population of more than 200 000. The Celsius Library is the most impressive building of them all. According to inscriptions in Latin and Greek on the wings of the front steps, the Library was erected in ad 110 by the Consul G.J.Aquila for his father, G.J. Celisus Polemaeanus, formerly Roman Consul and governor of the Asian province.