The Chapel Maggiore of the
Basilica of San Francesco, frescoed by Piero Della Francesca over the course of
the XV century, was reopened to the public after its restoration in April of
2000.
The project needed, on the
one hand, to resolve the delicate problem of an insertion of a body of light
into the frescoed interior space, and on the other hand, to succeed in
guaranteeing optimal lighting conditions whether from the point of view of
uniformity in lighting or from that of conservation.
The project finally forsaw
the advent of a removable element placed on the ground at the center of the
frescoed space. This idea was examined
from a technical lighting standpoint by selecting the light sources most
suitable to the correct perception of colors and verifying the geometries of
the light at each frescoed area whether through experiments on site or through
simulations with scale models.
The central lighting element,
from which departed 48 different beams of light, was a synthesis of lighting
outlets, orientation and cooling technology, and the expected formal aesthetics
for its insertion into the interior of the Chapel.
This element consisted of
four slenderly shaped legs on which rested a thin oval platform at around two
meters high. The platform housed all the
universal joints for the various orientations of the light sources. Within the inside of the legs passed all of
the electrical connections into the base where all the lighting outlets and
controls were located.