The Bologna Pavilion is completely identical to the Paris Pavilion, both in architecture and indoors: a residential unit and a round unit for project exhibitions, the ‹Diorama›. On the east side, right next to the entrance, the oversized graphic letters EN (for ‹Esprit Nouveau›) decorate the building. The pavilion is shaped to Le Corbusier's ideal: a flexible space, strongly characterised by the intrusion of light and air – two basic elements – a logical arrangement of the furniture and subdivision by colour.
Flooded with light, the large living room presents itself with double height and an entire glass side in the south. A staircase gives access to the first floor and gallery above the living room. The white floor tiles enlarge the room optically, which is enhanced by the ceiling colour in the front area, directly under the gallery: a bright 4320N bleu céruléen 59 makes the ceiling look distant and airy. In the room, there are more shades from Le Corbusier's Architectural Polychromy: the 32001 blanc dominates the living room, but on the side of the loggia, the 32120 terre sienne brûlée 31 stabilises the wall, which is interrupted by a window. To extend the window downwards, Le Corbusier chose the same bright blue for the radiator and the wall behind as on the ceiling. This colour continues on the ceiling above the stairs. Further sidewalls can be found in 32052 vert clair or 32111 l'ocre rouge moyen. The eye-catcher of the central terrace is the large tree, which stands out through the eye in the roof and illustrates the dialectic exchange between inside and outside. The dominant colour of the walls is blanc, as in the living room, but only on one side. The walls facing the living room and the fixed concrete bench use the tone 32120 terre sienne brûlée 31 from the first room and have a fixing effect here as well. Sunlight makes the colour look warm and draws contrasting shadows. The screen protection on the balustrade is alternately coloured in 4320N bleu céruléen 59 and 32060 ocre. If you walk across the loggia to the other end, you get to the two-storey diorama. Here you will find the blanc, ocre, dark umber and bright red ocher, which are fixing and dividing the columns, the stairs and other elements in the room. The horizontal windows just below the ceiling are, due to the curvature of the walls, an architectural eye-catcher and a light source of the diorama. The second floor of the pavilion leads to the rooms and the gallery above the living room. Here, the internal distribution is characterised by the use of different architectural colours. Thus, areas are subdivided without using room dividers or doors, as Le Corbusier placed one of his focal points on the open area, which was to be used to the maximum. So, you can find walls and radiators as well as doors and another built-in curved concrete bench in colours like coelin blue, blanc and light red ocher. It is interesting that, throughout the building, different types of floor coverings are designed, which plain colours complement the architectural colour design of the pavilion.
Le Corbusier's pavilion fulfills 4 of the ‹Five points of a new architecture›. Thus, the free floor plan allows a flexible use of the rooms, the free façade brings more space and airiness and although this implies no characteristic use of the horizontal windows, some rooms are provided with long windows to have an optimal use of light. Originally, Le Corbusier had planned a roof terrace, which is not open to the public in Bologna. If Le Corbusier's idea of superimposed modular apartments had come true, then of course only the upper units would have been able to use a roof terrace. The Pavilion de L'Esprit Nouveau is not a classic, but a unique living machine that could be replicated serially and modularly.