Actually it was a rather large wall. It was empty, blank and boring, without decoration.
As you stand there looking at this large boring space you ask yourself what you are going to do with that large unadorned space. One picture just wouldn't be enough because you want something more. The wall needs something more.
The answer? Try an art pair. Two photos that are somehow tied together. It could be colors or subject matter that connects them. Perhaps they are opposites, the same location, or the same location in different seasons. Whatever it is, they are in some way connected.
The wall, with its simple art pair of photos, has become a thing of beauty. The look is not crowded or over done. It is just enough.