Ground plan of the Circus of Caracalla in today Capena outside the Porta S. Sebastian, in the two boards meet together 

Giovanni Battista Piranesi's engraving, "Ground plan of the Circus of Caracalla in today Capena outside the Porta S. Sebastian," is a detailed architectural drawing of the ancient Roman Circus of Caracalla. The etching depicts a bird's-eye view of the circus, showcasing its oval shape, the central spina, and the surrounding seating areas. The intricate details and precise measurements highlight Piranesi's mastery of architectural representation and his keen interest in Roman antiquity. Piranesi's work, representative of the 18th-century fascination with Roman ruins, is considered an important document for understanding ancient architecture.