The city of Cagliari is characterized by strong environmental and landscape components. The city developed close to the hills, which in medieval times evolved as fortresses or military and civil outposts for territorial control. From the top of the homonymous tuff hill, the San Michele Castle stood as a vigilant sentinel over the access route from the Campidano hinterland to the town of Cagliari. The panoramic position of the castle, along with its historical significance, qualifies it as one of the most important monuments in the city of Cagliari.

The morphological characteristics of the hill and the presence of the Asse Mediano di Scorrimento, which runs alongside it, have facilitated the creation of a margin between the urban fabric of the historic center of Pirri.

The Giardini di Fedro serve as a hinge between the two areas, creating a typological hybrid that takes advantage of the potential of the sloping sections in both directions. It provides a comprehensive solution to the edge while also resolving the site's elevation change. The building aligns with the street at the upper level before retreating towards the valley, creating a softer connection to the tower-like buildings.

At the center of the complex is the Piazza di Fedro, developed around the centuries-old olive tree, which serves as the focal point of the entire development. The square functions as a filtering space, from which pedestrian and vehicular pathways radiate. Cars are parked in the lower level, leaving the visual focus of the internal square free. This space, in turn, acts as a "viewpoint" from which the panorama of the hill and the San Michele Castle can be seen, which thus becomes both the archetype and the visual destination of the project.

The composition of the building is influenced by the archetype of the medieval castle. The towers and limestone walls alternate with a play of voids and solids, where large verandas and balconies of the residences are embedded. The architectural appearance is therefore characterized by massive, vertical stone elements and tripartite glass balconies that run horizontally, lightening the long facades. The verandas and balconies are narrower on the street side, becoming deeper and opening towards the internal square. Steel Corten metal grilles divide the balconies and conceal service elements for the residences.

The project is designed as a symbiosis between the garden and the building. Greenery becomes a fundamental component of the architectural appearance. Natural elements develop vertically from the courtyard up to the roof levels of the building. The panoramic terraces are enhanced with hanging gardens and wooden pergolas, creating a protected and intimate microclimate.

Access to the complex is through the central section of the street-facing facade. Two offset stone walls create a break between two blocks of the building.

The covered passage opens onto the Piazza di Fedro, where access to the various apartments and parking spaces is distributed. A wall of climbing greenery clings to a Corten steel grille and welcomes residents and visitors to the complex.

The building is designed to accommodate 21 apartments in 4 blocks spread across 3 above-ground levels, with a semi-basement used for storage. The building’s morphological and typological features create a variety of housing unit types, expanding the residential offer.