FIDE

Founded in 1924, The World Chess Federation/Fédération Internationale des Echecs, (FIDE), is recognised by its members and the International Olympic Committee as the international federation in the domain of chess, the supreme body responsible for the sport of chess and its Championships. FIDE has the sole rights to organise the World Chess Championships and the Chess Olympiads. It is comprised of 186 international chess federations  

FIDE's official website: fide.com