1. Introduction 2. Special Relativity 3. The Equivalence Principle 4. General Relativity 5. Einstein's Field Equations 6. The Schwarzschild Metric and Black Holes 7. Cosmological Metric and Friedmann's Equations 8. Solutions of Friedmann's Equations 9. Cosmological Constant and the Dark Universe 10. Cosmic Distances 11. Summary of the Foundations of Cosmology 12. Cosmic Inventory 13. Brief History of the Early Universe 14. Cosmic Microwave Background Radiation