(b Oran, Algeria, 15 Sept 1929). French architect and teacher. She moved to France in 1947 and after study at the Sorbonne and the Ecole des Beaux-Arts, Paris, she opened her own practice at Ivry-sur-Seine, near Paris. During the 1970s and early 1980s she was involved primarily with social housing, most of her projects being located in densely populated urban centres. She advocated bringing nature into urban housing, through the use of garden-balconies and courtyards. Many of her projects have been extremely large in scale, such as the social housing and community development (1968–87; with Jean Renaudie) at Ivry-sur-Seine, comprising 800 flats and maisonettes, together with shops, nursery, medical centre and library. Between 1975 and 1986 she designed 180 balcony flats at Saint-Denis, which betray formal ties to Le Corbusier; a severe, planar geometry is relieved only by the outwardly jutting triangular balconies and cylindrical columns raising the flats above a lower level of shops. Gailhoustet later moved away from urban social housing, frustrated with the restrictions of zoning rules and other regulations. In the late 1980s and after she was involved in housing projects outside France. One of the most ambitious is a housing development (1986–9) on Ile de la Réunion, Indian Ocean. Along with housing, the development includes schools and a shopping centre built on a steeply sloping site. Gailhoustet also lectured at various architectural schools in France and was a professor at the International School of Architecture, Sofia.