Ton Van Lokhorst was the architect of the Rijksarchief in The Hague, Holland and he desgined these archive shelves, or bookracks, to be used in his building. The stone, which resembles slate, is from Belgium and has been left in its orignal state but can be darkened. The steel frame has the original paint and the bar at the front is used as a step to reach the higher shelves. The shelving shown is 42" inches wide and 42" increments are available.  Holland circa 1890