I. Introduction. 1. Wittgenstein's Philosophy in Its Historical Context/ 2. Biography. G.H. von Wright, Wittgenstein in Relation to His Times/ G.Kreisel, Zu Wittgensteins Gesprächen und Vorsungen über die Grundlagen der Mathematik/ R.Krejci, Wittgensteinand the Paradoxes in Philosophy/ A.Hübner, Ludwig Wittgenstein: Leben und Philosophie/ F.Parak, Ludwig Wittgensteins Verhältnis zum Christentum/ II. Wittgenstein's Early Philosophy. 3. Ontological, Methodological, and Semantic Problems of the Tractatus/ 4. Logical and Mathematical Problems of Wittgenstein's Early Philosophy/ 5. Problems of Philosophy of Science/ 6. The Limits of the Tractatus: Mysticism and "Showing"/ III. Wittgenstein's Later Philosophie. 7. Wittgenstein's Later Philosophy of Language and Semantics/ 8. Language Games/ 9. Private Language/ 10. Deontic Problems- On Certainty/ IV. General Problems of Wittgenstein's Philosophy. 11. Psychology and Philosophical Psychology/ 12. Problems of Verstehen/ 13. Ethics/ 14. Religion/ 15. Aesthetics.