2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/148463X-ray and gamma-ray observations of Seyfert 1 galaxies are briefly reviewed. Both thermal and non-thermal model for X-ray and gamma-ray emission are discussed. Particular attention is given to various disc-corona models including both homogeneous and inhomogeneous (patchy) corona models. Recent work on exact radiative transfer in such geometries are reviewed.6 pages; l-aa style; 6 postscript figures; Proceedings of 3rd Compton Gamma-Ray Observatory Symposium, Munich, 1995; Figure 5 is changed to the correct oneAstrophysicstext