your ID: 0055 First Name: Alessandro Last Name: Marconi Affiliation: INAF-Osservatorio Astrofisico di Arcetri Title: The relation among Black Holes, their host galaxies and AGN activity Authors: Alessandro Marconi Topic: 1 Session: oral Abstract: I will discuss the genesis of BH-galaxy relations and I will then derive the demography of local BHs. The comparison with expected AGN remnants will then allow me to analyze the connection among BHs, Xray-background and galaxies with enphasis on the down-sizing inferred from the latest AGN luminosity functions.