La Grande Arche de la Défense (French: [la ɡʁɑ̃d aʁʃ də la defɑ̃s]; "The Great Arch of the Defense"), also called La Grande Arche de la Fraternité (French: [fʁatɛʁnite]; "Fraternity"), is a monument and building in the business district of La Défense and in the commune of Puteaux, to the west of Paris, France. It is usually known as the Arche de la Défense or simply as La Grande Arche. A 110-metre-high (360 ft) cube, La Grande Arche is part of the perspective from the Louvre to Arc de Triomphe. The distance from La Grande Arche to Arc de Triomphe is 4 km (2 1⁄2 miles).
Organizations headquartered in the Grande Arche include the Bureau d'Enquêtes sur les Événements de Mer (BEAmer), the French marine accident investigation agency, in the southern portion.