The Triwizard Tournament
The Triwizard Tournament is a magical contest held between the three largest wizarding schools of Europe: Hogwarts School of Witchcraft and Wizardry, Durmstrang Institute, and Beauxbatons Academy of Magic, each school being represented by one Champion. Selected Champions compete in three tasks - traditionally judged by the Headmasters or Headmistresses of the competing schools - designed to test magical ability, intelligence and courage. Champions compete for the honour and glory of winning the Tournament and for the Triwizard Cup and a monetary prize. The first Tournament was held in 1294.
The Tournament has been renowned for being extremely dangerous: champions have died while competing, and so it was discontinued after 1792.
In 1994, however, the Tournament was revived with restrictions in place in an attempt to stop any potential deaths. One of these restrictions was that all applicants had to be of the Wizarding Age of Majority (which is 17) or else they would not be allowed to apply to be champion. The 1994 Triwizard Tournament is famous for having had four competing Champions, and for also having ended in tragedy with the death of Cedric Diggory and for the Rebirth of Lord Voldemort. It is unknown if the three schools planned any further Triwizard Tournaments after the death of Cedric Diggory.