Optical prints (or vue d’optique) were made to be viewed in a special apparatus that provided the viewer with an illusion of depth (early 3-D). The large mirror employed in the viewing machine showed the image reversed so many of these views have the titles and information engraved forward and backwards to facilitate viewing in the machine or by hand. These prints were only produced for a short period of time (1740 to 1790) and then were replaced with the invention of the smaller steroviewer. These views are some of the most distinctive and interesting images of the eighteenth century, and their distinctive engraving style, striking perspective and bright original color makes them as visually delightful as they are historically fascinating.

A striking view of the central courtyard of the monastery of El Escorial in the foothills of the Sierra de Guadarrama, just northwest of Madrid. El Escorial was built to commemorate the Spanish victory over the French in the battle of Saint Quentin (1557) and as a monument to Spain's role as a center of the Christian world. When constructed between 1563 to 1584, it was the largest building in the world.

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Condition: B+

Minor soiling and one short tear that just enters neatline at right that has been closed with archival tape.