All riding horses can benefit from use of dressage principles and training techniques. However, horse breeds most often seen at the Olympics and other international FEI competitions are in the warmblood category. Warmbloods are a group of middle-weight horse types and breeds, primarily originating in Europe, registered with organizations that are characterized by open studbook policy, studbook selection, and the aim of breeding for equestrian sport. Dressage is an egalitarian competition in which all breeds are given an opportunity to compete successfully. Therefore, many other breeds are seen at various levels of competition. In non-competitive performances of classical dressage that involve the "Airs above the ground", the "Baroque" breeds of horses, most notably the Lipizzaner, are seen most often. The Lipizzan or Lipizzaner, is a breed of horse closely associated with the Spanish Riding School of Vienna, Austria, where the finest representatives demonstrate the haute ecole or "high school" movements of classical dressage, including the highly controlled, stylized jumps and other movements known as the "airs above the ground."