Black holes as D3-branes on Calabi–Yau threefolds

We show how an extremal Reissner–Nordström black hole can be obtained by wrapping a dyonic D3-brane on a Calabi–Yau manifold. In the orbifold limit T6/Z3, we explicitly show the correspondence between the solution of the supergravity equations of motion and the D-brane boundary state description of such a black hole.