The first recorded Olympic Games were held in 776 BCE at Olympia in honor of Zeus. Originally, the games consisted of only one event: a 192-meter footrace called the 'stade.' Over time, events like wrestling, boxing, and the chariot race were added. The games were so culturally significant that a 'Sacred Truce' was declared throughout Greece during the competition, allowing athletes and spectators to travel safely even between warring city-states. Only free-born Greek men could compete, often doing so entirely naked to celebrate the human form. Winners did not receive medals, but rather a wreath of olive leaves and immense fame in their home cities. The games were held every four years, a period of time the Greeks called an 'Olympiad,' which they used as a basis for their calendar.