Walter Riedweg (born in Lucerne on 26 December 1955) and Mauricio Dias (born in Rio de Janeiro on 27 October 1964) have collaborated since 1993 on public art projects in which they take approaches and techniques derived from the fine arts and performance and incorporate them in interactive multimedia works. By addressing issues of public concern, Dias and Riedweg seek to involve the public directly in their artistic activities.