We have seen how in 582 B.C. the old local musical festival which had been held at Delphi every eight years was transformed into a Panhellenic four-yearly festival with an athletic and equestrian programme copied from Olympia under the presidency of the amphictyonic league. Delphi now became a second centre of this league, which consisted originally of the twelve tribes dwelling round the shrine of Demeter at Phylae or Anthela. The league was administered by a council composed of two representatives from each tribe, the Hieromnemones, who met twice a year in spring and autumn at Phylae and Delphi alternately. Their autumn meeting must have coincided every fourth year with the Pythian festival which took place in the month of Boukatios, about the end of August. An amphictyonic law of the year 380 B.C.[332] contains full details of the duties of the Hieromnemones. Besides the general care of the sacred territory, precinct, monuments, and revenues, they were responsible for all the preparations necessary for the Pythia. They saw to the repairs of the stadium, hippodrome, and other buildings; they arranged the programme, made provision for the sacrifices and processions; they saw that the sacred truce was duly proclaimed, and sent invitations to the various states of Greece, while each Hieromnemon was individually responsible for the state of the roads and bridges by which the official theorioi would travel to the festival. At the games themselves certain of their number, with the title of ἐπιμεληταί, acted as stewards and judges, and presented the laurel crowns to the victors. The actual presidency at the games seems usually to have been entrusted to the Thessalians, whose influence predominated in the league.