As the final victory of Athens over Aegina was in 458 BC, the thirty years of the oracle would carry us back to the year 488 BC as the date of the dedication of the precinct and the beginning of hostilities.
The final triumph of Athens over Aegina occurred in 458 BC, while the thirty years of the oracle would transport us back to 488 BC as the date of the dedication of the precinct and the commencement of hostilities.