In 1920, the First National Bank building on the corner of Fair Oaks and Mission in South Pasadena looked like this. Notice the streetcar tracks in the middle of Fair Oaks:
Today, almost completely restored and about to open as a branch of Comerica Bank, it looks like this:
For more information, including a glimpse at what the building looked like in the interim, see today's post on Laurie Allee's wonderful blog Glimpses of South Pasadena.
A careful examination of the back of the building reveals that the stonework is a facade. I presume the original stonework was a facade as well. To see what the building looked like before this restoration, go to Google Maps and look at the street view of Fair Oaks and Mission.