In Beirut, there are signs that designate buildings, sections of town, monuments, etc. that have special cultural or historic significance. They're brown rectangles with a white border and white lettering. They're part of the visual vocabulary of the city.
Consider this post from nearly half a year ago, featuring an artist's clever twist on the brown culture signs.
And here's another that I like just as much. The other day in Hamra, I noticed this creative take on the culture signs:
This faux sign designates the wall as a street art mural. Here's a context photo.