This beautiful stone building is not ancient ~ or even "old" for that matter. I attended a meeting with a group from the Tohono O'dham Nation and this building was adjacent to our conference room. The rocks were quarried nearby and the building was erected just a few years ago as their Elderly Center. It was locked but I was able to peek in through a window at the courtyard. Check out the beautiful stripped log lintel above the entrance and the special door handles.