  The content of this review is summarized here through the titles of its
sections, as follows:
  1. Introduction: Schwarzschild's original solution and the ``Schwarzschild
solution''.
  2. The wrong arrow of time of Hilbert's manifold is at the origin of the
Kruskal extension.
  3. An invariant, local, intrinsic quantity that diverges at the Schwarzschild
surface.
  4. The singularity at the Schwarzschild surface is both intrinsic and
physical.
  5. Conclusion.

General Relativity and Quantum Cosmology