Vienna’s innovative social housing projects demonstrate the city’s commitment to affordability, high-quality architecture, energy conservation, and resident participation. In addition to other infrastructure systems and facilities, the effectiveness of the housing program has helped in making the city one of the most livable cities in the world, as judged by The Economist and Monocle in 2012, and as the city that offers the world’s highest quality of life, according to Mercer’s Quality of Living survey for the past four years.