Catiline's Three Dimensional Picture of a Clay Seal from a Papyrus
This is a clay seal, about one inch across, used to close a Greek document written on
papyrus. The date is unknown, but the document came from Egypt, and was found by the
Egypt Exploration Fund around the beginning of the twentieth century. The figure on
the seal is unidentified. The original is in the collection of the Bancroft Library
University of California at Berkeley.
To obtain the three-dimensional effect, stare at the image, then cross your eyes, keeping
the image in focus. The two images will become four, and then the two middle images will
become superimposed, making three images. The middle image will be a three-dimensional
image of the clay seal.
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