This gathering was apparently originally related to the meetings of the
Delian League, a religious alliance (
amphictyony) to which the
Cyclades and the neighboring
Ionians on the coasts belonged. This amphictyony seems originally to have been instituted simply for the purpose of religious worship in the common sanctuary of
Apollo Delios, the patron god (,
theos patroos) of the Ionians, who was believed to have been born at Delos. The Delia, as appears from the
Homeric Hymn to Apollo (147), had existed from very early times, and were celebrated every fourth year, possibly in the Athenian month of
Hieros, or in
Thargelion, to apply to Delos the Athenian calendar. The members of the amphictyony assembled on these occasions () in Delos, in long garments, with their wives and children, to worship the god with gymnastic and musical contests, choruses, and dances. That the
Athenians took part in these solemnities at a very early period, is evident from the
Deliastoi (afterwards called
Theoroi, '
) mentioned in the laws of Solon; the sacred vessel (), moreover, which they sent to Delos every year, was said to be the same which Theseus had sent after his return from Crete. The Delians, during the celebration of these solemnities, performed the office of cooks for those who visited their island, whence they were called '. In the course of time, the celebration of this ancient
panegyris in Delos ceased, and it was not revived until the sixth year of the
Peloponnesian War, in
Olympiad 88 year 3 (426 BC), after the Athenians had expiated the Island of Delos, removing all the contents of their graves there to
Rheneia, and ordaining that henceforth nobody should either be born or die on the island. After this restoration, Athens being at the head of the Ionian confederacy took the most prominent part in the celebration of the Delia; and though the islanders, in common with Athens, provided the choruses and victims, the leader (), who conducted the whole solemnity, was an Athenian (
Plutarch Nic. 3; Wolf.
Introd. ad Demosth. Lept. p. xc.), and the Athenians had the superintendence of the common sanctuary (see
Amphictyons). ==The Lesser Delia==