| 1999 | Kunst‐Kabinett‐Knauf, Cologne |
| 2000 | Traces
Fairsicherungbüro Cologne |
| 2002 | The Lyrical I
Evangelischer Gemeindeverband Cologne‐North |
| 2002 | Church Songs as Objects of Art
Forum Paul‐Gerhardt‐Kirche, Cologne |
| 2004 | Accrochage
Gallery Heinz Bossert, Cologne |
| 2004 | Leoš Janáček's Life and Music as Reflected in the Work of Artists from Bonn
Museum of the City of Brno in Burg Spilberk, Brno, Czech Republic |
| 2006 | Making My Marks, Gestural and Scriptural Drawing and Painting
Cultural Center Hardtberg, Bonn‐Duisdorf |
| 2007 | Drawing
Artists' Forum Bonn |
| 2007 | Soundcheck ‐ In the Silence
Artists' Forum Bonn |
| 2008 | BFCS (Business & Finance Consulting Services), Düsseldorf |
| 2011 | NFN (Nachhaltiges Finanznetzwerk AG), Cologne |
| 2013 | let it flow
Colored Woodcuts and Drawings by Kinu Fujimoto (Kyoto) and Mark Hartzheim (Cologne)
50 Year Anniversary of Kyoto and Cologne as Sister Cities
Tenri Japanese‐German Cutural Center Cologne |
| 2017 | Open Studios, Cologne |
| 2022 | "KunstSaat 26"
Art Association of Hof ‐ Member Exhibition
Kulturplatz Altes Landkrankenhaus, Hof |
| 2023 | Union of Franconian Artists:
94th Annual Exhibition
Plassen Castle, Kulmbach |
