In commemoration of Husserl's many years of teaching and research in G ttingen, the G ttingen Academy of Science staged an international symposium in Husserl's jubilee year 2009. The results are presented in this edited volume. The contributions are arranged into three thematic groups: (1) Husserl's philosophy of subjectivity, (2) Husserl's theory of the intentional object and his definition of the relationship between truth and evidence, (3) Husserl's philosophy of mathematics and logic.