Le Defi Mark Ten International was one of the most prestigious strongman contest in the world in the 1980s and early 1990s. Staged in Quebec, Canada, it was begun as a tribute to Louis Cyr and was notable for the quality of the strength athletes it attracted, which included a number of winners of the World's Strongest Man competition, including Jón Páll Sigmarsson, Bill Kazmaier and Magnús Ver Magnússon.