Luftschloss is a fragile wire house that was especially imagined for the Neukölln district in Berlin, which was at this time in gentrification process. It is suspended, therefore does not occupy any territory on the ground and questions the appropriation of public space while recalling the tree houses of our childhood. The image of the house reminds us of our origins, where we come from (it was often associated with the mother's womb). It preserves a part of our past: "Thanks to the house, a great number of our memories are housed" (Gaston Bachelard, the poetics of space). The installation is an apparition for the inhabitants who do not necessarily notice it immediately in the urbanscape, but may have the feeling that something is missing when it disappears. It represents the transition and the change, and gives us a glimpse of the possibilities of a city.