“…Similar hierarchies are sometimes witnessed unexpectedly, as in the case of the few housing towers in Vienna, which operate in a very different way from the city's strongly regulated housing market and attract an affluent clientele that are used to this type of housing investment product 41 . Moreover, new regulations, bypassing the long-term existing tenement regulations in Vienna, have liberated/ deregulated a considerable part of the housing market (the top floors of the old housing stock-Zinshäuser) in the city center 42 , eventually promoting social mix and vertical social hierarchies at the micro scale.…”