The Roman antiquities, t. 4, Plate XLII. Vista of some of the great parts of the façade of the main entrance of the Portico d`Ottavia. 

This etching, "The Roman antiquities, t. 4, Plate XLII. Vista of some of the great parts of the façade of the main entrance of the Portico d`Ottavia," is part of the renowned series "Antichità Romane" by Giovanni Battista Piranesi. The image provides a detailed architectural study of the Portico d'Ottavia, a Roman structure in Rome, featuring a portion of the grand entrance. Piranesi's precise and meticulous style, combined with his masterful use of light and shadow, renders the intricate details of the architectural elements, including the columns, entablature, and inscription, with impressive clarity. His work is a testament to the enduring fascination with Roman architecture and its influence on later periods.