The second stage of San Xavier.
Last time I visited was about a year and a half ago. Inside is fairly ornate and services are still held there. My fondest memory is when several friends dressed in friar clothes with cameras around their necks and posed in front as if they were tourists. It was for a local ad campaign I believe. I sure hope they got permission to do that. It was back in the early 80's so the statute of limitations has long expired.