The Twentieth Century Society is a British charity that campaigns for the preservation of architectural heritage from 1914 onwards. The society's interests extend to buildings or artefacts, whether important or humble, rare or commonplace, that characterise twentieth-century Britain. The Society was formed as The Thirties Society in 1979. They provide support and advice to architects and planning authorities to protect the best twentieth-century architecture and design, whether through listing or sympathetic development and management. Their work aims to highlight the importance of forgotten (and sometimes controversial) 20th-century buildings to our architectural heritage: anything from a phone box to a power station, from a 1920s private house to a 1970s shopping centre.