The Medialab Matadero, formerly known as Medialab Prado, is a cultural space and citizen lab in Madrid (Spain). It was created by the Madrid City Council in 2000, growing since then into a leading center for citizen innovation. It follows a participatory approach, using collective intelligence methods and fast prototyping tools such as fab labs, to use and co-create digital commons.

Langdon Winner is Thomas Phelan Chair of Humanities and Social Sciences in the Department of Science and Technology Studies at Rensselaer Polytechnic Institute, Troy, New York.