This chapter investigates the nature of our grasp of structures by means of visual experience. Structures, which are properties of structured sets of things, are abstract. Does this mean that we can only know a structure under some theoretical description, as the structure of models of this or that theory? Or can there be some more direct mode of comprehension, one that involves visuo-spatial experience? The case for the latter possibility is presented.
Keywords: structure, visual experience, finite structures, visuo-spatial experience