Joseph William "Joe" Calzaghe (born 23 March 1972) is a Welsh former professional boxer.
He held the WBO, IBF, WBC, WBA and The Ring magazine super middleweight titles, as well as The Ring light heavyweight title. Calzaghe is the longest-reigning super middleweight world champion in history, having held the WBO title for over ten years and making 21 successful defences before relinquishing the title to move up to light heavyweight. As his super middleweight and light heavyweight reigns overlapped, he retired with the longest continual time as world champion of any active fighter. More: fr.wikipedia.org.