sentences:  He also championed and justified with the UN the Italian international protectorate over Ethiopia which ended at the end of 1959.In 1955 Ambrosini was elected by Parliament as a Justice of the Constitutional Court, of which he became the Chief Justice in 1962 holding that position until the end of 1967.He is credited with watershed constitutional decisions which asserted the primacy of the Italian Constitution not only over the laws adopted by the democratic Parliament but also in respect of those passed during the preceding fascist period; as well as the primacy of European law over Italian law.