mark was crossed in September 2019. Collection It was opened in 2002 as a scientific and historical museum, around four axes: the Redoutable, first SSBN submarine of the French Navy, now a museum and the largest submarine in the world open to the public a permanent exposition a cylindrical aquarium, 8 metres wide and 10 metres high, which displays the successive marine life forms according to the depth a great hall where temporary expositions are held a new underwater expedition in a virtual, digitised building. External links Official Cité de la Mer museum website References Maritime museums in France Museums in Manche Cherbourg-Octeville Buildings and structures completed in 2002 Museums established in 2002 2002 establishments in France 21st-century architecture in France