By 454 Athens moved the treasury of the Delian League from the Island of Delos to the Parthenon in Athens. Benefitting greatly from the influx of cash coming out of the 150-330 members, Athens used the money to reinforce its own naval supremacy and used the remaining funds to embellish the city with art and architecture.
By transferring the treasury of the Delian League from Delos to the Parthenon in Athens, 454 Athens strengthened its naval dominance and used the funds to beautify the city with art and architecture.