Active galaxies

Abstract

In this paper I will review, in an unavoidably incomplete and biased way, the main results obtained by XMM-Newton on Active Galactic Nuclei. I will then highlight the major issues still open in which XMM-Newton can still give important contributions, expecially if the observing programs will shift in the future towards more long exposures of single objects and observations of large samples. I will also argue in favour of a legacy program consisting of good S/N observations of a flux-limited, sizeable sample of AGN.