The mouth of the Cloaca Maxima 

This etching by Italian artist Giovanni Battista Piranesi, depicts the mouth of the Cloaca Maxima, a large ancient sewer in Rome. Piranesi, known for his detailed and dramatic depictions of Roman ruins, used strong chiaroscuro and a sense of depth to create a powerful image of this historic structure. The etching provides a glimpse into the city's ancient infrastructure and serves as a reminder of the enduring legacy of Roman engineering.