the Berlin Wall, constructed by the Soviet Union to divide Berlin into NATO and Warsaw Pact zones of occupation, became a worldwide symbol of oppression and isolation. Social media walls Another common usage is as a communal surface to write upon. For instance the social networking site Facebook previously used an electronic "wall" to log the scrawls of friends until it was replaced by the "timeline" feature. See also Ashlar Chemise (wall) Clay panel Climbing wall Fabric structure Hy-Rib List of walls Sleeper wall Stone wall Tensile structure Terraced wall Thin-shell structure Wallpaper References External links Archaeological features Home Property law Structural system