In 1973, the architect discovered an old cement factory no longer in use in Sant Just Desvern, a town in Catalonia, Spain, just outside of Barcelona. The factory was dated from the first period of the industrialization of Catalonia, and as such, was not built at once or as a whole, but as a series of additions as the various chains of production became necessary. It consisted of enormous silos, a tall smoke stack, machine rooms, some four kilometres of underground tunnels and stairs that climbed to nowhere.