The Panhellenion was a league of Greek cities drawn from five Roman provinces. Centred in Athens, its function was largely religious.
Citation:
Bouchard, Elsa. "Establishment of the Panhellenion by Hadrian".
The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=11464, accessed 23 May 2013.]