Everyone, what's all these paintings about?

This pic is taken at Saryan street near Tapastan(wine place). I heard that there are some other walls carrying the same painting. What's all that about? I heard it has some kind of meaning.

This pic is taken at Saryan street near Tapastan(wine place). I heard that there are some other walls carrying the same painting. What's all that about? I heard it has some kind of meaning.