Quadrennial sports festival.
The games, conceived in 1940 as an event for the nations of the Western Hemisphere, were first held in 1951. Patterned after the Olympic Games and sanctioned by the International Olympic Committee, the games are conducted by the Pan American Sports Organization (PASO), or Organización Deportiva Panamericana (ODEPA), headquartered in Mexico City. All major international sports and several more specialized events are included in the regular program. They are held the year preceding the Olympics, in various host cities.