A conversion scheme for the 19th century arsenal in the city of Metz,
adapting it to provide a home for the Symphony Orchestra of Lorraine.
The restoration of the building, with its 10.000 m2 (11.961 sq. yards)
of built surface, was directed at accommodating a rehearsal hall, a
concert hall for chamber music, a restaurant, exhibition gallery,
offices for administration, management and centre services and a
1.500-seater auditorium. One wing of the building, originally square
with a 30 (100’) x 50 m (166’) interior courtyard, has been sacrificed
in order to open up the central courtyard to the city, forming a public
square and giving a better view of the Templars chapel, which dates from
the 12th century. The façade has been slightly modified by means of
cladding with slabs of natural stone with metal joints which underline
the rhythm of the arches. The introduction of big new windows has
lightened the heavy, opaque solidity of the old military building. The
main auditorium is underground, situated beneath the central square. The
roof, with its wooden structure covered with anodized steel, is flat,
the problems of reverberation were resolved by means of a design based
on detailed studies of acoustic performance. The hall has two ramped
seating areas; the smaller, with a pronounced incline, can be used to
accommodate the choir when necessary. The orchestra pit is located between these two seating areas, on the lowest level of the auditorium.