A Font in a Hard Place

I was making a deposit at the bank, waiting for the cars to move forward, when i spied the following photo op. Here's this sign tucked away from street and surrounded by large buildings on both sides. You wouldn't have known it was there unless you were looking for it. Which raises an interesting question: How do you know it's there to begin with if you don't know where something is in the first place?

So far typography through my searching has showed that it can be disrupted by nature and now removed from the public eye.