I see that Anogramma is a fern. . . There is no columbine-like foliage in photos 3 and 4. I'm guessing the columbine-like foliage in photos 1 and 2 is either a columbine growing right next to the putative fern, or the fern has some foliage stages that resemble columbine. http://en.wikipedia.org/wiki/File:Anogramma_leptophylla.jpg
In the background there is Adiantum capillis veneris. These leaves, of course, could belong to a Chelidonium majus, more likely than an Aquilegia. see photo. I am still betting of a member of the Fern family. Aquilegia sp., being quite common in the region where I live, I know the plant well. It is not the habit of Aquilegia sp. to grow on walls, but on the edges of roads or woods, where there is to be found a rich soil.
Cannot determine which of these two families this plant belongs. Pteridaceae or Polypodiaceae. I have searched Google images and the only plant I could find that is practically similar is: Pteridaceae..Cryptogramma crispus. This plant is not is not to be found in the region where the photograph was taken. Could even be a Botrychium sp.?
Hi Spoonlegs, I refer to the 4 images posted on 11/16/2013. Crypogramma crispus is practically identical to the plant on the 4 images. But as I mentioned before, dispersion of this plant doesn't include the Region Campania.