| Public exhibitions (Selection) 4
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| Feuchtbiotop - Kunstwerden e.V., Essen |
2007
| Ensemble - ICA - Institute of Contemporary Art - University of Pennsylvania, Philadelphia, PA |
2006
| Sonambiente - AdK - Akademie der Künste, Berlin |
2005
| Katja Kölle & Rolf Gerhards - Paarlauf - Museum der Stadt Ratingen, Ratingen |
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