This is a drawing of a staircase illuminated by arched windows. The drawing depicts a dimly lit interior with a prominent staircase that ascends to the upper left of the image. The architecture features tall, arched windows with detailed grid patterns through which light filters, casting shadows on the walls and floor. The staircase, with its intricate railing, climbs along a wall and turns at a landing. The use of line work suggests movement through the space, emphasizing architectural details and the direction of light.