The concept, known as the "Cultural Cathedral," is realized through four concrete actions: reconstructing the perimeter of the block with a continuous base structure, clearly marking the three civic entrances for each constituent part (the Conservatory on Ste-Catherine, the OSM on de Maisonneuve, and the government offices on Bleury), creating an outdoor urban space in front of the Imperial Cinema, and defining identifiable urban features. This last action gives rise to the "Nave," the main interior space that links the components along a north-south axis, bringing together all performance and production spaces, which are suspended within this area to embody the architectural expression of harmony in music.