Barrière de fer
Raymond Adolphe Séré de Rivières (20 May 1815 – 16 February 1895) was a French military engineer and general whose ideas revolutionized the design of fortifications in France. He gave his name to the Séré de Rivières system of fortifications constructed after the Franco-Prussian War of 1870. Described as the Vauban of the 19th century, his Belgian counterpart was Henri Alexis Brialmont.