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The page appears to be a sketchbook leaf or a scrap used for drafting, containing architectural diagrams at the top and a figurative drawing in the center.
A? H?
Architectural plan A technical drawing showing the layout of a building or structure from above., Diagram A simplified drawing showing the appearance, structure, or workings of something., Sketch A rough or unfinished drawing or painting, often made to assist in making a more finished picture., Figure drawing A study of the human form in any of its various shapes and postures.