2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/145764An historical account of the reasoning that led to the discovery of the Kerr and Kerr-Schild metrics in 1963-1964, and their physical interpretation as rotating black holes, is presented.34 pages, 2 figures, cupbook.cls. To appear in "The Kerr Spacetime", Eds D.L. Wiltshire, M. Visser and S.M. Scott, Cambridge Univ. PressGeneral Relativity and Quantum Cosmologytext