The principle by which the façades are read is simple: each façade of the block, depending on its orientation, has its own window module whose dimensions have been determined on the basis of a study of the thermal and light inputs necessary for each orientation of the block. Added to this initial reading is the work with colours: all the peripheral façades are black in colour, while each of the patios is done in a bright colour (bright orange for the offices patio and anise green for the hotel patio). The contrast between the dark periphery and the bright patios immediately identifies the block as a signal building on the scale of the overall territory. The structure of Block 1 is post-and-beam type, in concrete with a lightweight applied wood-frame façade with FunderMax finish cladding.