Student life at Marathonos 34 is concieved around a modular composition which can be inserted into the long and narrow urban space of this ancient Athenian area. Circulations and outdoor living spaces that hug the building to the limits parcel constitute fully the volume of the building. The living units are seeking the depth of field, fostering openings and development of an effective interface that spread spaces to be annexed by related student groups to self-manage the site. These semi covered outdoor spaces characterize use of utilities that shares the independence of the street and the quiet of an interior. The flexibility of uses a part of these interfaces to allow multiple students to develop in places convenient for their age, family situation, or their financial resources. The collective spaces evolve according to the migrations of the students and open onto passageways and terraces which are gradually associated.