1. During the month preceding the ancient Olympics, no wars were permitted, so as to allow the spectators to travel unharmed across Greece.
The modern Olympic Games or Olympics creation was inspired by the ancient Olympic Games, which were held in Olympia, Greece, from the 8th century BC to the 4th century AD. Heralds would be sent to advertise the onset of the Games throughout Greece. According to a sacred truce, no wars could be fought for a month and no obstacles were to fall in the way of spectators. In the subsequent centuries, the period was changed to three months.
2. In ancient Olympics, athletes competed in nude.
Though, it is not known exactly why they did that, one story suggests that the loincloth of a runner once slipped down and he tripped on it. After that all other runners would remove their loincloths to avoid such accidents. But, nudity was a fundamental aspect of Greek culture. Good health and strong athletic body were appreciated and admired. It was also said to be an exhibition of coming-of-age, when young men would reach their adulthood and would proudly display their bodies.