Video Tonnis started to make videos in 2006. His subjects have included William S. Burroughs, Thomas Bernhard and the poet Georg Trakl. Alongside these works stand the video series of "Dreams", "Electrical Pictures", and animals—exhibiting a pop, surreal pictorial language, often humorously staged. Since 2009 Tonnis produced 132 short documentaries about art projects, exhibition setups, openings and interviews for the Kunstverein Familie Montez. Of these, 16 works from December 2020 show the process of creating an 18 × 3.25 meter mural that was created by more than 40 artists in the joint project "Ein ganz normaler Herbst, nur anders ... 2020" ("A completely normal autumn, just different ... 2020). The short documentaries go together with a "Family Album", created out of video stills. Solo exhibitions (selection) 1986: Zeichnungen, Galerie Das Bilderhaus, Frankfurt 1986: Zeichnungen, Galerie 42, Gießen 1989: Christiaan Tonnis, Galerie Einbaum, Frankfurt 1990: Christiaan Tonnis, Galerie Limberg, Frankfurt 2006: Dialog, Kunstverein Eulengasse, Frankfurt 2006: Zeichnung und Malerei, Höpershof, Hannover-Wedemark 2007: CATWALK!, Kunstverein Eulengasse, Frankfurt 2010: Hinter dem Spiegel (with a performance by Eva Moll), Klosterpresse, Frankfurt 2011: Christiaan Tonnis: Thomas Bernhards "Frost", Kunstverein Eulengasse, Frankfurt 2019: Christiaan Tonnis – Screening Montez 2009-14, Kunstverein Familie Montez, Frankfurt 2021: Christiaan Tonnis – Novalis (Performance), Kunstverein Eulengasse, Frankfurt Group exhibitions and festivals (selection) 2007: Sem Palavras / Ohne Worte, Instituto Histórico de Olinda, Olinda 2008: Antarctic Meltdown, Melbourne International Arts Festival, Melbourne 2008: Sanlu Yishu, Huajiadi Beili Wangjing, Beijing 2008: Digital Fringe 08, Melbourne Fringe Festival, Melbourne 2008: Road Movie, Frieze Film at 6. Frieze Art Fair and Channel 4, London 2008: Electrofringe, This Is Not Art, Newcastle 2009: Gut ist was gefällt, Kunstverein Familie Montez, Frankfurt 2010: 2009 Was A Rough Year – Lilly McElroy, Thomas Robertello Gallery, Chicago 2012: Terremoto – Beben, by Nikolaus A. Nessler, in collaboration with Christiaan Tonnis (Film), Nico Rocznik (Light) and Manuel Stein (Sound), Kunsthaus Wiesbaden 2013: Wurzeln weit mehr Aufmerksamkeit widmen, Kunstverein Familie Montez and Der Laden/Bauhaus University, Weimar 2014: Les Fleurs du Mal – Dithering Cities, Luminale, Frankfurt 2015: Kunst Messe Frankfurt 15, Kunstverein Familie Montez, Hall 1.2, Messe GmbH, Frankfurt 2017: Supermarket 2017, Stockholm Independent Art Fair, Stockholm 2018: Quinceañera, Kunstverein Eulengasse, Frankfurt 2018: Supermarket Art Fair, Daily Film Documentation of Performances, Stockholm 2019: Latitudes Festival, Santa Cruz de la Sierra 2019: Open/Occupy II, Kunstfabrik am Flutgraben, Berlin 2020: Participate NOW!, EULENGASSE @ Platforms Project NET – Independent Art Fair, Athens 2020: