After looking at the Cell Phone Disco I saw these plaques along the alley wall. At first I assumed it was some "Find Jesus" sign and the wall was part of a church. Then I read one and I was like "wtf?" And I see something familiar at one end.

The building is actually a theater, part of Pittsburgh's Art District. The Memento Mori and Bobo are the work of Mary M. Mazziotti.