The volume Ancient Cities III collects the proceedings of the International Conference held in Potenza (Italy, October 2019): more than 20 papers in English, Italian, French and German, concerning civic life, economy and society of the Graeco-Roman world, and covering four thematic areas between the 5th cent. BCE and the 8th cent. CE (I. Classical and Hellenistic Greece. II. Greece and the East of Hellenistic and Roman culture. III. Rome and the West between the late Republic and the High Empire. IV. The late antique world between West and East).