After Architectural Digest (clipped to polyvore.com)
I just love this stairway. I found the photo on polyvore and the attribution is unclear. It appears to be a photo from an Architectural Digest editorial and the text under the photo reads as follows:
"Custom-made moldings amplify the elegance of the entrance hall, which contains a Regency settee and a 1920s Navajo rug; the sconce is by Vaughan, and the umbrella stand is a Ming-dynasty sake jar. The art displayed along the stairway includes a colorful work on paper by Joan Mitchell."
I don't think it applies to this photo. The rug is not a Navajo rug, neither is the settee a Regency style one. But who cares, it is magnificent. If I have to guess it is a recent renovation somewhere in So Cal and they stayed very true to the Spanish Colonial Revival style.