Located at the southern end of the Erasmus Bridge, this – for the Netherlands - relatively tall tower (98 meters, 23 storeys) provides office space for the KPN Telecom company. The façade that is facing the city and the bridge is clad with green lights, distributed over the glass. They work as a giant billboard and change every day, with the season, activities, festivals or just show KNP-logos. The 37 x 72 meter / 2922 m2 monochrome screen turns into a place to a giant public display for animations and graphics. It consists of 896 square Osram lamps in a 22*41 grid.