Natural History (Inventors of Various Things)
Pliny the Elder, Natural History, 7.57 from The Perseus Digital Library.
Lycaon first instituted gymnastic games, in Arcadia; Acastus funereal games,at Iolcos; and, after him, Theseus instituted them at the Isthmus. Hercules first instituted the athletic contests at Olympia.
ludos gymnicos in Arcadia Lycaon, funebres Acastus in Iolco, post eum Theseus in Isthmo, Hercules Olympiae;