# The Strangeness of Black Holes

Enrico Brehm: Black holes are some of the strangest phenomena in our universe. Here, we first want to discuss them as objects of a classical physical theory, where classical means that we forget about all possible quantum effects and their consequences. In the present case the underlying classical theory is Einstein’s theory of gravity. It describes space and time in terms of a collection of fields whose behavior is dictated by the Einstein equations.