\noindent 1 - From Schwarzschild to Kerr: the development of a concept \\ \\ 2 - The geometry of black holes \\ \\ 3 - The energetics of black holes \\ \\ 4 - Black holes and astrophysics \\ \\ 5 - Hawking's radiation and black hole thermodynamics \\ \\ 6 - Hairy and higher-dimensional black holes