The girl with the square on her forehead

OK I know it is more like a diamond than a square but really it is only a square on the side is it not?  Go on, it is, you know it is.

This mural is actually on one side of a square near the forum gym so there is another square, and finally, the image is more or less square.

Thanks to Laurie54 for hosting MM this month and some great challenges.