The project started from the attention to a double demand: on the one hand, the design and construction of small urban pieces for the 2010 edition of 'La noche en blanco', which on that occasion was held in a section of the Gran Vía in Madrid; on the other hand, the ambition to respond to needs not covered by the city council, so that the ephemeral architectures, in addition to generating various recreational activities during that night, could later be used in the spaces where they are really needed, thus amortizing, from the economic and intellectual point of view, the expenditure made...[+]