Dagmar Keller (1972 born in Germany) and Martin Wittwer (1969 born in
Switzerland) both studied at the Academy of Fine Arts Düsseldorf and Dagmar also at the Academy of Media Arts Cologne. They have collaborated together as an artist duo since 1997, creating extensive photographic cycles, film and video installations.
The artist duo has presented its artworks in numerous solo and group exhibitions, at festivals and venues such as transmediale, Berlin (GER, 2002), Argos Arts Centre, Brussels (BEL, 2002), Nicolaj Contemporary Art Center , Copenhagen (DEN, 2002), Taipei Fine Arts Museum, (TRE, 2003),
Migros Museum für Gegenwartskunst
, Zürich (SUI, 2003), hmkv Hartware MedienKunstVerein, Phoenixhalle, Dortmund (GER, 2004), sonar, International Festival of Advanced Music and New Media Art, sonarmatica at MACBA, Museum of Contemporary Art, Barcelona (Esp, 2005), Kunstmuseum Thun, (SUI, 2007), BACC, Bangkok Art and Culture Centre, Bangkok, (THA, 2008), Optica, Centre for Contemporary Art, Montreal (CAN, 2009), Württembergischer Kunstverein, Stuttgart (GER, 2010),Kunstmuseum Bonn (GER, 2016), Oldenburger Kunstverein (GER, 2017) and Kunsthalle Nürnberg (GER, 2018)

At the 5th International Photobook
at LeBal, Paris, their book dummy
Passengers has been selected for the Dummy Award 2012. The book Passengers was published with Spector Books Leipzig, 2013.

2016 Dagmar Keller and Martin Wittwer published their second book
POINT DE DÉPART with Spector Books.