T4 , by vladimir bonacic , 1969 , installation , Cyber Art style
A black and white photo of a metal structure.
 a black and white photograph of a metal structure. The structure appears to be a large metal box. The metal box has a rectangular opening on one side. The opening has a series of ridges and grooves that create a mesh-like pattern on the outside of the box. There is a small opening on the side of the metal box on the right side. There are two metal legs at the bottom of the structure.