The long and compact body, that allows the simultaneous vision of the two sides of the ridge from any environment, symbolizes the border, the threshold to cross, emerging as the main theme of the projectual research. A concept that is develop in a different way in the ground floor (day) and the 1st floor (night). The project borrows, from the traditional rural home in Le Marche region, the compactness and the longitudinal development of the building with residential space in a row.