Ancient Olympics Games 

The Olympic Games reached their zenith in the 6th and 5th centuries BC, but then gradually declined in importance as the Romans gained power and influence in Greece. There is no consensus on when the Games officially ended, the most common-held date is 393 AD, when the emperor Theodosius I declared that all pagan cults and practices be eliminated. Another date cited is 426 AD, when his successor Theodosius II ordered the destruction of all Greek temples. After the demise of the Olympics, they were not held again until the late 19th century.

Modern Olympic Games
The evolution of the Olympic Movement during the 20th and 21st centuries has resulted in several changes to the Olympic Games. Some of these adjustments include the creation of the Winter Games for ice and winter sports, the Paralympic Games for athletes with a physical disability, and the Youth Olympic Games for teenage athletes. The IOC has had to adapt to the varying economic, political, and technological realities of the 20th century. As a result, the Olympics shifted away from pure amateurism, as envisioned by Coubertin, to allow participation of professional athletes. The growing importance of the mass media created the issue of corporate sponsorship and commercialization of the Games. World Wars led to the cancellation of the 1916, 1940, and 1944 Games. Large boycotts during the Cold War limited participation in the 1980 and 1984 Games.