What is the size of the cupola?
The cupola, meanwhile, measures 16 meters in diameter and 55 meters in height. The sublime basilica, perched on the hill of Montmartre at 130 meters above sea level, offers a breathtaking view of the capital.
The cupola which surmounts it, with an internal diameter of 16.70 m, is characterized by its great lightness thanks to the use of a technique which was very widespread in North Africa, consisting in building the vaults using of ceramic tubes fitting into each other.
Illustrations The dome of the Pantheon in Rome, 2nd century, remained the largest dome in the world for many centuries. It remains today in an excellent state of preservation. Romanesque tambour cupola on pendentives of the old cathedral of Salamanca, Spain
Insulation value of a dome. The degree of insulation of a roof dome depends on the presence of glass, the number of layers and the thickness of the walls. Thus, a two-layer plastic roof dome usually has an insulation value of 2.8 W/m²K. A three-layer dome has an average U-value of 1.9 W/m²K.
This cupola was built above a network of tunnels, warehouses, launch facilities and barracks. The complex was designed to house a large arsenal of rockets, fuel and ammunition and was to be able to launch V2s at an industrial rate.