When and where was the idea of gold, silver and bronze medals for sport event competitors introduced?

10th century BC, Ancient Greece
3412
3rd century AD, Ancient Rome
3140
1904 Summer Olympics, St. Louis
13307
1936 Summer Olympics, Berlin
1882
The choice of metals comes from the first three Ages of Man in Greek mythology: the Golden Age, when men lived among the gods; the Silver age, where youth lasted a hundred years; and the Bronze Age, the era of heroes.
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