Equestrian sports are among those contested at the Summer Olympic Games. Equine events began at the Olympics in 1900, when competitions in polo (considered by the International Olympic Committee (IOC) to be a separate sport from the other equestrian events), vaulting, four-in-hand driving, mail coach driving, mixed hacks and hunters and three types of jumping (high jump, long jump and show-jumping) were held. Most of these events were later discontinued, although equestrian events have continued through the 2008 Summer Olympics, and now include team and individual dressage, three-day eventing and show-jumping. Competitors in the modern pentathlon event also have to complete an equestrian show-jumping course, but this is not part of the equestrian events.