the games were operating on a pan-hellenic basis from about 480 bc; after the
destruction of corinth in 146, the games were moved, but after corinth was rebuilt
in 44bc they soon recovered control.
the games were a big deal, and were featured on the coins of corinth.
vital to our understanding is the fact that they happened in the same place
every time (every two years). so the parallel might be better if you imagine
combining the olympics with the local ferver of ut football.
humorous note : in 66/67, nero competed in the games with a composition of his
own (they had added song to the competition)...and won.
www.ioa.leeds.ac.uk/.../70094.htm