Rock Creek, below Culp's Hill, Pennsylvania, 19th century stereoscope card.

During the Civil War, photographers produced thousands of stereoviews. Stereographs were popular during American Civil War. A single glass plate negative capture both images using a Stereo camera. Prints from these negatives were intended to be looked at with a special viewer called a stereoscope, which created a three-dimensional ("3-D") image. This collection includes glass stereograph negatives, as well as stereograph card prints.