April 6, 1555, Charles, by the grace of God, Holy Roman Emperor, Semper Augustus, King of Germany, King of Italy, King of all Spain, Castile, King of the Two Sicilies, Sardinia, Corsica, King of Jerusalem, King of the Western and Eastern Indies, Lord of the Isles and the Pacific, Archduke of Austria, Duke of Burgundy, Brabant, Lorraine, Styria, Carinthia, Carniola, Limburg, Luxembourg, Gelderland, Neopatrië, Wurttemberg, Landgrave of Alsace, Prince of Swabia , Count of Flanders, Tyrol, Barcelona, Hainaut and Holland.
In defense of its borders with regard to the French King François 1st. He bought from the Earl of Agimont-Givet and its 25 villages a rocky peak at the height of Givet in order to block the Meuse.
He built two bastions in his name: Charlemont (Le Bastion and Bastion Du Moulin De La Meuse). Later the fort was linked to the Citadel Du Comte De Namur.