The Twentieth Century Society

The Twentieth Century Society

Abbreviation	C20
Formation	1979 (as The Thirties Society)
Headquarters	70 Cowcross Street, London
Director	Catherine Croft
Chairman and Trustee	Hugh Pearman
President	Catherine Slessor
Website	c20society.org.uk

The Twentieth Century Society (abbreviated to C20), founded in 1979 as The Thirties Society, is a British charity that campaigns for the preservation of architectural heritage from 1914 onwards. It is formally recognised as one of the National Amenity Societies,^[1] and as such is a statutory consultee on alterations to listed buildings within its period of interest.