The city hall of Montpelier, designed by architects Jean Nouvel (Paris) and Francois Fontes (Montpellier), was built in the Port Marianne area. The new building is an imposing blue parallelepiped (90 meters long, 50 meters wide, 41 meters high, 12 levels) of 27,000 m2, 12,000 m2 of offices. It rises on the banks of the Lez and represented a total investment of 130 million euros. Its steel structure is clad in aluminum and glass facades. Undertaken by firms Bec Construction and Castel & Fromaget (Fayat Group), it took four years of work. It was inaugurated by Helen Mandroux, mayor of Montpellier, Saturday, November 12, 2011.