Magic Sighting Downtown?

Things look to be under construction on some sort of doorway in American Alley in downtown Petaluma, according to this photograph taken some weeks ago.

In our summary exploration and investigation of this photograph, we have seen no such construction on the Alley Walls.

Things persist in being mysterious and magical, and while we are currently flummuxed, we encourage one and all to report on any alleyway developments (or any other magical-like activity).