Introduction; 1. The first version of the proof; 2. Gödel's 'intuitionistically acceptable' second proof of the First Incompleteness Theorem; 3. The unprovability of consistency; 4. Löb conditions and adequacy; 5. Other proofs of the First and Second Theorems; 6. Mathematical Incompleteness; 7. Set Theoretical Incompleteness; 8. Further philosophical consequences of the Incompleteness Theorems.