Tetragrammaton and falafel

Found amidst the graffiti in the restroom at Sultan's Market in Wicker Park.

Sigil of Amon street art

It looks as though someone was summoning Amon on the North Street bridge.

For the record:
"AMON, a strong and powerful marquis, who appears like a wolf with a serpent's head, and vomiting flame.  When so ordered, he assumes a human shape, but with the teeth of a dog.  He discerns past and future, procures love, and reconciles friends and foes."

"sigil" street art

As seen in Wicker Park