de Visscher, Fernand Keywords: Air law | Private international law | Mots clefs: Droit aérien | Droit international privé | ABSTRACT The conflict is open between universalism and nationalism, notes Fernand De Visscher in the introduction of his course. In order to give an account of this situation, the author starts his course with a presentation of the trials of law related to air law. He then studies the property of aircrafts, air transport and the responsibility of the owner for the damages caused to the third pa…