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 |