Roman Ingarden, the great scholar and master of some among us, who has laid down for his disciples a work-foundation, and who has not only inspired us by the absolute faithfulness to the demands of reality but who has also maintained for decades our faithful allegiance to this task, is no longer among us. This volume is to commemorate the 20th anniversary of his death. The scrupulous and indefatigable work, which he has accomplished and left behind, has a specific significance for us and contains some irreducible factors relevant to all tendencies and trends of philosophy. This becomes more evident if we review the various stages in which the knowledge of his work has been spreading. The path which it took leads from the early book reviews, through the period of his total absence from the scene of Western Europe, which was dominated since 1945 by an environment uncongenial to his own eidetic interpretation of phenomenology, up to his later breakthrough, emphasized by an homage paid to him in the For Roman Ingarden, Festschrift of 1959,1 which brought attention to his then still linguistically inaccessible work and which culminated in his later international successes, manifested by the German edition of his main works and his lecturing throughout Europe and the United States.