Launched very early onto the international stage, Clemens Quatacker first studied with his father and then with J. DeLoof, H. Gadeyne and Y. Menuhin. After winning numerous prizes, among them the Prix Vieuxtemps in Verviers and in 1955 the 10th prize of the Queen Elisabeth Competition, he was invited to undertake concert tours in Europe, Africa, Mexico, Canada, Haiti, Uruguay, Brazil, ... He had many contacts with David Oistrakh, who had a high opinion of his young talent. In 1967 he founded the string quartet that bore his name, an ensemble that found rapid success. His group was regularly asked to perform at festivals, national and international. Clemens Quatacker has taught the violin at the Queen Elisabeth Music Chapel and has an honourary chair at the Brussels Conservatory.