The huge amount of data obtained by surveys in all wavebands, from radio to X-rays, has allowed major progress in the understanding of Active Galactic Nuclei and of their cosmic evolution. This book contains the proceedings of a conference intended to give a broad overview of the recent results obtained by recent AGN surveys over the whole electromagnetic spectrum. Topics which were discussed during the conference and are included in this volume are: AGN evolution, contribution to the cosmic background, AGN luminosity functions in different wavebands, multiwavelength properties of AGN,...

These proceedings contain contributions from leading scientists in astrophysics, cosmology and related fields such as gravitation and elementary particles physics. It provides a review of the status and the prospects of research in these fields for an audience of astrophysicists and physicists.