The French Royal Navy's network of dockyards was further strengthened in the 18th century. In 1750, the Marquis de Montalembert converted a former paper mill into a forge producing cannons at Ruelle-sur-Touvre. In 1777, Antoine de Sartine, Louis XVI's Navy Minister, opened a cannon foundry near the naval shipyards in Indret. In the same year, work started on the development of the port in Cherbourg, which was completed in 1813. In 1778, the Lorient naval dockyards succeeded "La Compagnie des Indes du port de L’Orient".