Not, Urn, No turn, Nocturne. We are living in a time of severe crisis. The past is insisting. The long night in which the victims of Nazi eugenics went to their death is shaken by a trail of light. This trail shows the place where the wall of the Sonnenstein gas chamber was located, a wall that was torn down to cover up the crimes. So, the trail reveals the saddest night, urn and grave for many in this society characterised by the worst negation. But the forgotten wall that separates the gas chamber extends into our divisions, in the past and present. No turn. May we prevent that.