Gilbert Kleissner alias CEDES born on September 11, 1970 in Graz.
His artist name CEDES is an acronym, an abbreviation, for “CElebrated DESign”.
The painter, conceptual artist and actionist currently lives and works in Graz.
The gallery owner Gottfried Geiger became aware of Kleissner very early on and supported him.
Member of Schaumbad – freies atelierhaus graz since 2014

• 2008 | his first book presentation at Ulmer Verlag.
• 2012 | Hengsberg, painting actionism, art in public space
• 2012 | Graz, Art Mile, Art in public space
• 2013 | Graz – Actionism “spiritual begging”
• 2013 | Vienna – Leopold Museum, Actionism for the “Clouds” exhibition
• 2013 | Painting campaign with the VS Gamlitz
• 2013 | Participation in Actionism for Hermann Nitsch’s 75th retrospective in his museum in Mistelbach and painting campaign “Intoxication of the Senses” in Mistelbach
• 2014 | Actionism at the premiere of the Styrian Autumn “red carpet” in Graz
• 2014 | Vienna – Inclusion in the Belvedere Archive
• 2014 | Vienna – Inclusion in the database “Basis Wien die Angewandte”
• 2015 | Graz – Styrian Autumn, art action “Heritage” The art of Cedes is laid to rest
• 2016 | Artistic resurrection as Gilbert Kleissner
• 2016 | Graz – MindBurn Festival, art installation “Rundgangerl”
• 2016 | Höch, painting actionism, art in public space
• 2016 | 2019 – Public “live painting performances” in Berlin, Innsbruck, Sankt Pölten, Mils bei Hall with Heinz Aschenbrenner
• 2019 | Graz, Art in public space, Onlookers
• 2025 | Life Cycle Part 1: „Das Erwachen“