Venetian blind in double glass, CajaMadrid by Foster 
The front panel is a very elaborate piece. We must remember its size: 4.7 x 1.5 m, and its weight: 750kg. Then its composition: from the total 4.7 m height, 1.5 m corresponds with the opaque covering of the ceilings and raised floors, and protects from fire transmission among plants. The other 3.2 meters are glazing. The bottom of the glass corresponds with the floor, while the top grows about twenty centimetres higher than the ceiling. This space is where the venetian blind hosts when closed. All components are extra clear glass, with very high transparency.