| 1994 |
- "Creativity in Defiance of Tyranny" the theatre work of Frantisek Zelenka (1904 - 1944) Theatre Designer/Director/Architect: Gallery London in association with the National Museum Prague. |
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| 1997 |
- Ralph Koltai Retrospective: Lethaby Gallery London, then tour in association with British Council to Beijing, Hong Kong, Taipei and Prague. |
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| 2003 |
- Ralph Koltai "Landscapes of the Theatre" Oribe Hall Tokyo, in association with the Japanese Society of Theatre Designers. |
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- "A Lear of our Times" Prague Quadrennial Scenofest. |
| 2004 |
- Ralph Koltai "Landscapes of the Theatre" Royal National Theatre London Lyttleton Foyer September 2nd - October 2nd. |
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| 2005/7/9 |
- Linbury Biennial Prize for Stage Design: Royal National Theatre London. |
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| 2007 |
- Ralph Koltai "Explorations" A new exhibition of metal collage sculptures www.RalphKoltai.com. |
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Co-founder with Edwin Erminy (Caracas) of Opera Transatlántica an Anglo Venezuelan Theatre Company creating new music theatre in both countries.