Taken for Utata's Iron Photographer 44.
Required elements:
1-a window
2-part of a human body
3-square format
Of course, the mathematician would go with a square format rotated 45°.
"But soft! What light through yonder window breaks?" What light? I'll tell you what light. Utata light, baby, breaking right through that window, along with a body part and a square format. Take that, Mr. Shakespeare.