Bedrock City is a proposal to rehabilitate and restore the importance of quarries by creating troglodyte dwellings. The interventions are conceived in continuity with the theoretical research Living Mass. The Modern Reimagining of Troglodyte – Dwellings for Sustainable Architecture. The idea of this work is to propose a new type of dwelling and rethink our way of living by creating void as spaces rather than built ones. This monolithic architecture also provides for all our comfort needs. In the Carriere de Vorberg on the heights of Bienne, the cliffs dug during quarrying will serve as a foundation for a 600-home neighborhood, located in a steep rocky slope composed of collective housing, studio and apartment. The neighborhood will feature activities such as facilities, a sports center and stores. The design of the housing will respect the natural forms of the cliffs, minimizing visual impact. Communal spaces such as gardens, parks, public squares and panoramic terraces, promoting social interaction and the well-being of residents, will be designed using excavated stone. The district will be designed to encourage soft modes of transport, with cycle paths, footpaths, and connections to public transport networks directly linked to the center of Biel.