Colourful Doors

In summer 2013 the American artist Douglas Hoekzema not only created a colourful temporary artwork on the glass façade of the "designtower" in the 2nd district (click here for a photo) but he embellished also these doors (I guess they lead to a stockroom, utility room or garbage room). The artwork is long since gone, but the artwok on the doors remained uneffected.