  We review uniqueness theorems as well as other general results about higher
dimensional black hole spacetimes. This includes in particular theorems about
the topology of higher dimensional spacetimes, theorems about their symmetries
(rigidity theorem), and the classification of supersymmetric black holes. We
outline the basic ideas underlying the proofs of these statements, and we also
indicate ways to generalize some of these results to more general contexts,
such as more complicated theories.
