we recently exhibited friedhelm tschentscher's work together with wolfgang schmidt as the artists of “kassler concrete”, who studied and taught in kassel at the time, including krieglstein, böhm, fritz, schmidt, kallhardt, müller-domnick, schwitzki, tschentscher. it was the time of the second documenta, which they also helped to prepare. structurally…. road construction as well as internally. from him we are showing his mostly white wall reliefs and sculptures made of steel, iron, wood, and very early works of white and colorless acrylic glass from 1965, work from the circle and square, …