The ancient Olympics were rather different from the modern Games. There were fewer events, and only free men who spoke Greek could compete (although a woman, Bilistiche is also mentioned as a winner). As long as they met the entrance criteria, athletes from any country or city-state were allowed to participate.
1
6 people did
It varies nowadays. The ancient games were not between countries as we understand them today.
Citizens of Greek city-states who had the skill and could get themselves to Elis in a no-mechanical transport era.
it took place in Olympia
Well, firstly, they were nude in the Ancient, there were no medals (different prizes), their was completely different sports (chariot racing), only Greek cities took part, not countries, and only men were allowed to take part.
No.
In ancient Greece Olympia was the venue for the games which took their name after this city: The Olympic games. They were not in Athens. The modern Olympic Games are different.
100
a pig
Summer.
it is 2,626 people who took part in the 1920 olympics