Western Europe, the cradle of Protestantism and historically the seat of Catholicism, has become one of the most secular regions in the world. This is the clear manifestation of a process that a lot of scientists and researchers call "secularism", that has interested mostly European countries. The phenomenon of secularization has crucial territorial and spatial effects: the church buildings, that are distributed throughout the territory, are being closed, as they are underused; in some cases, they are declared redundant; sometimes they even come to be demolished. The master thesis explores how European states address redundancy issues; it investigates different national conditions and it examines if there are peculiar policy plans to be studied.