The outlines of the four core figures in the corers are becoming increasingly more precise.
These core bodies break up on the diagonal and extend by length X, which corresponds to the dimensions of the gallery. Here the break-up of the geometrical structure can be seen, and the core bodies form independent elements that are no longer tied into the grid structure. Zones emerge between the cotes, still keeping the grid in mind. The bookshelves are placed in these zones, following the lines of the grid. The lengths of cross walls of a defined dimension are now established in the corners of the figure, deriving from the extension of the diagonal cotes and following the old grid line tangentially. These walls can now be placed an equal distance apart along the external line in relation to the main axes.
It is particularly clear in this geometrical figure how the building develops outwards from the centre. The sequential development stages from the beginning to the final outline remain intelligible, and it is already possible to sense the centrifugal dynamic of the ground plan as a suggestive force.