Brunn has curated numerous posthumous exhibitions of Charlotte Posenenskes works in national and international galleries and museums and has written about her work in catalogues. The most important posthumous exhibitions curated by Brunn himself are:
Posthumous Solo Exhibitions
1886 Gallery Grässlin-Ehrhardt, Frankfurt/M
1986 Deutsche Lufthansa, Airport Frankfurt/M
1986/87 Gallery Paul Maenz, Köln
1988 Großmarkthalle Frankfurt/M
1989 Hauptbahnhof, Frankfurt/M
1989 Deutsche Bank, Frankfurt/M
1990 Gallery Meyer-Ellinger, Jahrhunderthalle Hoechst
1993 Skulpturenmuseum Glaskasten, Marl
2005 Gallery im Taxispalais, Innsbruck
2005 Museum der Gegenwartskunst Siegen, Siegen
2008 Gallery Mehdi Chouakri, Berlin
2008 Potsdamer Platz, Berlin (Daimler Collection)
2009 Art Basel (Performance)
2009 De Hallen, Haarlem
2010 Kunsthaus Zürich
2010 Kunsthalle Lingen
2010 John Hansard Gallery, Southampton (UK)
2011 Gallery Konrad Fischer, Düsseldorf
2011 Gallery Nelson-Freeman, Paris
2011 MMK, Frankfurt/M, (Degussa-Haus)
2011 Gallery Mehdi Chouakri, Berlin
2012 K21, Düsseldorf
2012 Kunsthaus Wiesbaden
2015 Chinati Foundation, Marfa, USA
2015 MUHKA, Antwerpen
2016 Middelheim Museum Antwerp
Posthumous Group Exhibitions
1990 Art Frankfurt (Art Fair), Frankfurt/M
2002 Generali Foundation, Vienna
2007 documenta 12, Kassel