Colin Ardley,
 Dittmar Krüger and Dirk Rathke – Particpation in the exhibition Blick zurück und voraus.
 20 Jahre FORUM KONKRETE KUNST at Peterskirche Erfurt with accompanying colloquium;
On Saturday August 24, 2013 Artist Talk:
 Semjon H. N. Semjon in conversation with Colin Ardley, 
Dittmar Krüger and Dirk Rathke:
 Konkrete Kunst in Dialogue with other artistic positions of the gallery program, 8/23 – 9/29/2013