The Royal Museum of the Army and of Military History was created for the World Exhibition in 1910. In 1923 it found its permanent home in the impressive Hall Bordiau, under a huge glass-and-cast-iron canopy. Its extensive holdings trace changes in military techniques from medieval times onward. Specific sections cover arms and armor from the Napoleonic era, 19th-century weaponry,  treasures of the Russian empire, tanks, uniforms, and even ships. The huge aviation hangar here holds early flying machines, balloons, biplanes, and supersonic fighters, including the American F-16 and the Russian MiG-21.