Die Heilige Familie | Rembrandt, 1646

Proposal: Above the canvas, a curtain rod is installed from which a red curtain hangs in the same position as in the painting.
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When the trompe-l’oeil becomes reality, what do we see?

Die Heilige Familie
Oil on canvas 46.5 x 69 cm
Kassel (Deutschland), Gemäldegalerie Alte Meister