Square tower with 15,000 sqm of thermally broken façade. Storey-high panels, width 4.5 m to 5.3 m, height 3.3 m to 4.22 m, internal aluminum coated, outer bronze skin with power-operated top-hung open out and drop special designed horizontally parallel moving out windows and integrated Venetian blinds. Solar control glazing, partly radar-reducing. Point-fixed glazed curtain walling at plinth, conservatory, stick system façades, all-glass façade in corner section, access equipment.