Extension of the Marseilles City Hall

Marseille, France
The Marseilles City Hall is a 17th Century building on the bank of the “Vieux port” (Old harbour). It needed a large meeting room, very close to the main building, without any alteration of the settings around.

The underground proposal by Architect Franck Hammoutène was retained,, and won the Silver T-square Prize of architecture

The extension is built under a multi-step esplanade along the 10 m difference of level from Hôtel-Dieu hospital to Vieux Port quay, around the ancient building, the settings of which is fully preserved and greatly valorised

The fan-shaped deliberation hall offering 300 seats has been isolated from noises and vibrations on the public square on its ceiling. A high nave on its side may serve as a meeting place for representatives during assembly time, and otherwise accommodates exhibitions.

Surface 8,300 sq m

Construction in was done in open cut.
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Additional pictures
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- Underground theatres and concert halls
- Underground public service facilities (archives, libraries, swimming pools)

- Architectural quality of urban environment has to be improved
- Service quality of the urban environment has to be improved
- Safety and security in urban environment has to be improved
- Valuable surface space must be kept available or become available again

- Unique innovation aspects
- Architectural factors
- Environmental impacts