a building is the work of the architect, a statue that of the sculptor etc - i wasnt questioning that fact.  Take a photo of a sculpture which removes it from its setting (ie black backdrop and even lighting) and yes it shouldnt be part of the photography gallery - however with buildings and scuplture it is extremely difficult to depict these 3d objects out of their environment - i challenge you to try taking a photo of anything 3d (which is immovable into a studio setting) which doesnt incorporate its surroundings or present a perspective which can be seen as interpretative by the viewer of the photograph.

For instance - try taking a photo of the London Eye without getting in the rest of the london skyline.  I have a photo in my gallery of the London Eye (Eye to the Sky) but it is an abstraction of the whole "building" and thus my own interpretation and thus my own art.  I also have two very different photos using St Pauls Cathedral as the focal point which incorporates other bits of "art" (ie the milenium bridge and surrounding buildings) to make it my own (St PaulsII or St Pauls)

Logically extending your argument to the limits of credulity - we made nothing in this world and therefore it is not ours to photograph and create art.  Everything we take a photo of was created by someone or something else  and therefore the photography gallery should not exist on those terms...(i have a photo of some gummi bears in my gallery - they were made by someone else (well - probably a machine) - does that mean it isnt my art?)

My reasoning was that a 2d peice of art can only be viewed as a 2d object and thus a flat photo of a painting etc is just copying the artist's work.  If the painter of your 2.5d peice decided that the use of the frame and floor were interacting with his art and made use of it, then that too is included in the "art" you are copying.  Just as if you took a photo of my photo of St Pauls (which incorporates more than one object of art / creation by an author) so to does your photo of this 2.5d work as the author incorporated the frame into the art (which was probably made by someone else)...

"In every colour, there's the light.
In every stone sleeps a crystal.
Remember the Shaman, when he used to say:
Man is the dream of the Dolphin"

Rich Meadows Photography