The significance of 5 rings of Olympics

Olympic rings

The five Olympic rings represent the five parts of the world involved in the Olympics and were designed in 1912, adopted in June 1914and debuted at the 1920 Antwerp Olympics.

The symbol of the Olympic Games is composed of five interlocking rings, coloured blue, yellow, black, green, and red on a white field. This was originally designed in 1912 by Baron Pierre de Coubertin, the founder of the modern Olympic Games. According to de Coubertin, the ring colours with the white background stand for those colors that appeared on all the national flags that competed in the Olympic games at that time. Upon its initial introduction, de Coubertin stated the following in the August, 1912 edition of Olympique:

"...the six colours [including the flag’s white background] thus combined reproduce the colours of all the nations, with no exception. The blue and yellow of Sweden, the blue and white of Greece, the tri- colours of France, England and America, Germany, Belgium, Italy, Hungary, the yellow and red of Spain next to the novelties of Brazil or Australia, with old Japan and new China. Here is truly an international symbol."

The Olympic Hymn
The Olympic Hymn, played when the Olympic Flag is raised, was composed by Spyros Samaras and the words added by Kostis Palamas. The Olympic Hymn was first played at the 1896 Olympic Games in Athens but wasn't declared the official hymn by the IOC until 1957.

 The Olympic Motto
In 1921, Pierre de Coubertin, founder of the modern Olympic Games, borrowed a Latin phrase from his friend, Father Henri Didon, for the Olympic motto: Citius, Altius, Fortius ("Swifter, Higher, Stronger"). 

A City, Not a Country
When choosing locations for the Olympic Games, the IOC specifically gives the honor of holding the Games to a city rather than a country. 
First Modern Champion
James B. Connolly (United States), winner of the hop, step, and jump (the first final event in the 1896 Olympics), was the first Olympic champion of the modern Olympic Games.

The First Opening Ceremonies
The first opening ceremonies were held during the 1908 Olympic Games in London. 

The Medals
The Olympic medals are designed especially for each individual Olympic Games by the host city's organizing committee. Each medal must be at least three millimeters thick and 60 millimeters in diameter. Also, the gold and silver Olympic medals must be made out of 92.5 percent silver, with the gold medal covered in six grams of gold.