Sergio Los (born 1934 in Marostica, Veneto) is an Italian architect and educator. He is considered one of the main interpreters of the Regional Bioclimatic Architecture, a design philosophy developed during the seventies (1972–1979) at the University Iuav of Venice under the pressure of the environmental and energy crisis. He developed a locally rooted architecture that adapts to the regional circumstances and uses the natural energetic potentials, especially solar energy. Already in 1980 he was contributing to the organisation PLEA (Passive and Low Energy Architecture ),[1] that promotes sustainable architecture on a worldwide scale.[2]