The work of Ângela Ferreira focuses on buildings and the meaning they have in different time frames, on different locations, for different people. From this view point she looked at the work of Álvaro Siza Vieira in the Schilderswijk in The Hague. In the 1980s Siza was invited to The Hague by Adri Duivesteijn, at that time alderman for housing, as part of the campaign 'Urban renewal as cultural activity'. Duivesteijn first came into contact with the architect's work when he visited Porto where Siza, as a member of the group SAAL (Serviço Ambulatório de Apoio Local - Local Ambulatory Support Service, 1974-1976) had realized a number of social housing projects together with the inhabitants. Duivesteijn was looking for an unconventional and visionary architect, capable of realizing meaningful and high-quality housing projects based on the existing cultures and the specific demands of local inhabitants. Revolutionary Traces focuses on this extraordinary period in the history of social housing and asks questions about the role of culture in urban renewal, the involvement of visionary administrators and the call of the government for participation by the inhabitants.