For example, once Germany declared war on France in 1914, it was decided to rename Berlin as Liège and Allemagne (French for "Germany") as Jaurès. The period during which the most stations were renamed was undoubtedly the post-World War II period - for example, Marboeuf at the center of the Champs-Élysées was renamed Franklin D. Roosevelt in 1946 and Aubervilliers-Villette was renamed Stalingrad the same year. The RER-Métro hub at Châtelet - Les Halles is the largest underground subway station in the world.