Demonstration of the exterior and interior of the window shows the bell of the Temple of Vesta 

This etching by Giovanni Battista Piranesi, titled "Demonstration of the exterior and interior of the window shows the bell of the Temple of Vesta," is a detailed architectural study of the Temple of Vesta in Rome. The image depicts a cutaway view of the window, showcasing the intricate details of its construction, from the external framing to the internal moldings and the bell within. The precise measurements indicated on the drawing demonstrate Piranesi's meticulous approach and his interest in the scientific analysis of classical architecture. Piranesi's work in the mid-18th century helped to revive interest in ancient Roman architecture.