The Roman antiquities, t. 4, Plate XXXIX. Plans and elevations of the remains of the Portico d`Ottavia. 

This is an etching by Giovanni Battista Piranesi, renowned for his detailed depictions of Roman architecture. The print, titled "The Roman Antiquities, t. 4, Plate XXXIX. Plans and elevations of the remains of the Portico d`Ottavia," presents a meticulously rendered architectural plan of the Portico of Octavia. Piranesi, through his intricate lines and precise measurements, showcases the grandeur of Roman antiquity. The image includes multiple views, such as a plan, an elevation, and detailed sections, offering a comprehensive understanding of this ancient structure. Piranesi's masterful engravings were instrumental in popularizing the study of Roman architecture, influencing generations of architects and art enthusiasts.