AOK-Systems Bonn Domizil at Venusberg Rheinauen Carré Horticultural show Leverkusen Sculpture exhibition S-Carré Technical College Bonn Sport facilities of the University Würzburg		Changing surface (concept), 2005, cortensteel, L 18 x B 19 x H 4,2m, Technical College Bonn-Rhine-Sieg ,  Technical College Bonn-Rhine-Sieg Segment shadow (concept), 2005, copper, H 5,8 x B 4,2 x 1,1m, Technical College Bonn-Rhine-Sieg