Both were designed for the 1900 World Fair, and the Grand Palais and the Petit Palais face each other on either side of the avenue Winston-Churchill, along the Seine, in the axis of the Alexandre-III bridge. However, the purpose of the two palaces, like their architectural style, differs. The Grand Palais houses three complexes – the Nef (Nave), the Palais de la Découverte, and the Galeries Nationales – which host major events, a science museum and temporary exhibitions. The Petit Palais houses the Musée des Beaux-Arts de la Ville de Paris. It is rich in 1,300 works that focus on the 19th century.