In excess of 1,300 miles of vaulted sewer tunnels, contain water mains, waste collection, compressed air pipes, gas pipes, telephone cables, and pneumatics tubes. They are totally navigatable by foot or boat, have street signs , are lit, and contain a modern museum in the sewers. Buoygues Construction Group Bouygues Construction Group is the largest general contractor in France and is a major participant in international construction. Recent signature projects include the Orsey Museum in Paris, Hassan II Mosque in Morocco, Pacific Place Towers in Hong Kong, the Normandy Bridge in France, The Presidential Palace in Turkmenistan, and the Rostock Tunnel in Germany . The guild of Les Compagnons are the worlds finest construction craftworkers.
Membership includes stonemasons, metal workers, carpenters, even chocolate makers.
Les Compagnons, and their six year apprenticeship training program, has existed since the middle ages. This museum documents the guild s history, apprenticeship training process, and contains the masterworks or terminal projects of the master artisans. LaFarge Construction Materials LaFarge is a world leader in materials which provides cement, aggregates and concrete, roofing, gypsum and specialty products. They employ 71,000 people in 70 countries. As innovators in construction materials, they currently hold exclusive rights on several concrete innovations including Ductal, an ultra high performance concrete, Agilia, a self placing concrete which requires no vibration, and Chryso, a superplasticizer for prefab concrete products.