Stock photography, photos: Faceless Offices Stock photos of Rows of concrete framed windows in a large office tower punctuated by a slice of blue sky and limited by the rectangular concrete panels of the next building. Department of Defence, Ottawa, Canada Photograph: © Peter Marshall Click for a larger image and more information Keywords associated with this stock photo: office, urban, architecture, exterior, concrete, grey, pattern, tower, window, workplace, city, defence, ottawa, canada, building, business, square, cold, simple