In 1776, he set up a commission to choose between Cherbourg, Ambleteuse or Boulogne as France's main strategic port for defence of the English Channel - this was headed by Suffren and also including Dumouriez (later governor of Cherbourg) and La Bretonnière.
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Exceeding Vauban's designs, he planned the construction of a 4 km long harbour wall between île Pelée and pointe de Querqueville.
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Construction began in 1783 and was completed in 70 years, by three architects - La Bretonnière, Louis-Alexandre de Cessart and Joseph Cachin.
Malcolm Harbour | Sydney Harbour Bridge | Cherbourg | Auckland Harbour Bridge | Darling Harbour | Portland Harbour | The Umbrellas of Cherbourg | North Harbour | Portsmouth Harbour railway station | Cork Harbour | Cole Harbour | Wellington Harbour | Waitemata Harbour | Victoria Harbour | Rye Harbour | Coal Harbour | North Harbour Rugby Union | Cole Harbour, Nova Scotia | Coffs Harbour | Poole Harbour | Lyttelton Harbour | Langstone Harbour | Harbour Town | Harbour Defence Motor Launch | Harbour Centre | Hamilton Harbour | District Council of Franklin Harbour | Chichester Harbour | Cherbourg-Octeville | Bristol Harbour |