Section of the pedestal and base of the column itself, the main door and window 

This architectural drawing by Giovanni Battista Piranesi, created between 1720 and 1778, shows a detailed cross-section of the base and pedestal of Trajan's Column. The image is divided into two sections, with the top section illustrating the stairway leading to the platform above the pedestal and the lower section illustrating the main door and window. The architectural detail of the column is clearly shown with labels in Italian. These engravings of architectural structures were a common genre in the 18th century, reflecting the rise of Neoclassical architecture. Piranesi, a master of this genre, was particularly famous for his detailed depictions of Roman architecture.