César (born Cesare Baldaccini; 1 January 1921 – 6 December 1998), also occasionally referred to as César Baldaccini, was a noted French sculptor. César was at the forefront of the Nouveau Réalisme movement with his radical compressions (compacted automobiles, discarded metal, or rubbish), expansions (polyurethane foam sculptures), and fantastic representations of animals and insects.

He was a French sculptor, born in 1921 to Italian parents from Tuscany in the working-class neighbourhood of la Belle-de-Mai in Marseilles. His father was a cooper and bar owner. After studying at the Ecole des Beaux-Arts, Marseilles (1935-9) he went on to the Ecole des Beaux-Arts in Paris (1943-8).