The genesis of the ancient Olympics is lost in the mists of time. Pindar, writing whole centuries after the beginning of the Olympics, mentions two myths and they cannot both be true. The best known one involves the demigod Herakles, son of the god Zeus (whom the Greek were also calling Dias and whom the Romans called Jupiter) and Alkmene, who among his labours had to clean the stables of king Augean. Augean reneged on the payment and so Herakles defeated him, slayed him and his sons (except one), confiscated the royal treasures, and dedicated them to fund an eternal Olympic festival in Zeus's honour at Olympia.
The other one involves Pelops. I cannot resist the temptation to tell the whole story. It is a perfect example of nice story-telling in Greek mythology. Oenomaus, the king of Pisa, had a daughter named Hippodamia, and according to an oracle, the king would be killed by her husband. Therefore, he decreed that any young man who wanted to marry his daughter was required to drive away with her in his chariot, and Oenomaus would follow in another chariot, and spear the suitor if he caught up with them. Now, the king's chariot horses were a present from the god Poseidon and therefore supernaturally fast. The king's daughter fell in love with a man called Pelops. Before the race, Pelops persuaded Oenomaus' charioteer, Myrtilus, to replace the bronze axle pins of the king's chariot with wax ones. Naturally, during the race, the wax melted and the king fell from his chariot and was killed. After his victory, Pelops organised chariot races as a thanksgiving to the gods and as funeral games in honour of King Oenomaus, in order to be purified of his death. It was from this funeral race held at Olympia that the beginnings of the Olympics were inspired. Pelops became a great king and he gave his name to the Peloponnesus.
However there is a third, more ancient, myth involving again an Herakles. This one was a Cretan hero, known as the Idaian Herakles, and four of his brothers, Aeonius, Epimedes, Iasius and Idas. They went to Olympia where Cronus had hidden the newborn Zeus. They organised a race (perhaps to entertain the infant) and the victor was crowned with an olive wreath. The four-year Olympic cycle, who was in fact a five-year one (πενθετηρίς) with the first and last year included, is supposed to honour the five brothers.
Be that as it may, the ancient Olympics were linked to the worship of Zeus. The gold-and-ivory Statue of Zeus (one of the Seven Wonders of the Ancient World) was located inside the Temple of Zeus in the sacred precinct of Olympia. A temple of Hera (Zeus' wife) did also exist, and in fact its construction predated that of Zeus' temple. Let's not forget that Herakles' name means "glory of Hera" and it was probably chosen so as to appease her, since Herakles was the fruit of an adulterous affair of Hera's husband.
I am not going to give details on the ancient Olympics. They can be found on the web and if you are interested you can look them up. The aim of this article is to show how the ancient Olympics did not resemble the modern ones. The birth of the modern olympic movement took place in the middle of the Victorian era and, as was unavoidable, it was burdened by that epoch's ideologies. And the latter had nothing to do with the ancient Greek ideals.
So, let us start at the beginning. First the ridiculous name: Olympic Games. There was nothing "gaming" in the ancient Olympics. They were called Olympic Contests (Αγώνες), and they are still referred to by this name in modern Greek. This is essential. The ancient Olympics, and in fact the whole ancient Greek society, were permeated by the spirit of competition. Only the victory counted. Why do you think there were no second and third prizes? It was not important just to participate as the Baron would like us think. And the word athlete comes from άθλος, a feat, an achievement, something that deserves a prize (έπαθλον).
Ι have already written about the amateurism misconception. Certainly the athletes in the Olympics competed for symbolic prizes like the olive wreath. However, back home, the winners were rewarded with substantial prizes, money, freedom from taxes, even lifetime pensions.
The ancient Olympics were not (until the Roman conquest of Greece) international. They were designed only for Greeks.
There is absolutely no evidence of all the modern paraphernalia: olympic rings, torch relays, flags, hymns and anthems.
The sacred fire in the sanctuary of Dias did not acquire a special significance during the Olympics, like the overhyped olympic flame.
And although during the ancient Οlympics a truce between warring Greek cities made possible for athletes and spectators to attend the Olympics, this should not be misinterpreted as a philosophy of understanding and brotherhood, as the modern Olympic movement would like us think.
As Donald Kyle, author of the monograph "Sport and Spectacle in the Ancient World", points out: the modern Games have become more and more removed from the ancient.