The project, for Banque Libano-Française, includes four underground levels, a data processing center and four stories above grade. Upper floors are devoted to management offices and open spaces that would be used only in the case of a disaster. We studied the principal of the bunker because of its ‘brutalist’ heaviness, coldness and the inevitable closure to its site of this facility located on a main road near Ghazir, a mountain village thirty kilometers north of Beirut. By way of contrast we sought to create an unexpected lightness inside. The interior was thus conceived as a kind of photographic negative of the exterior.