2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49895In this paper we review some properties of BPS black holes of supergravities with n=32,16 supersymmetries. The BPS condition, a condition on the eigenvalues of the central charge matrix, can be shown to be U-duality invariant. We explicitly work out D=4, N=8 and D=5, N=4 supergravities.Talk given at the TMR'99 meeting "Quantum aspects of gauge theories, supersymmetry and unification. Paris, September 1999. Uses JHEP.clsHigh Energy Physics - Theorytext