Celtic F.C. is a professional soccer team.
The 1966 -- 67 Scottish Cup was the 82nd season of Scotland 's most prestigious football knockout competition . Association football , more commonly known as football or soccer , is a team sport played between two teams of eleven players with a spherical ball . Celtic F.C. . The club enjoyed their greatest successes during the 1960s and 70s under Jock Stein when they won nine consecutive league titles and the European Cup . The UEFA Champions League is an annual continental club football competition organised by the Union of European Football Associations ( UEFA ) and contested by top-division European clubs .