In 1832, artist John Jesse Barker added depth to a drawing by Philadelphia-based William G. Mason to create an optical illusion titled “Horizontorium.” Part of a tradition of anamorphic works, this depiction of the Bank of Philadelphia is one of the two surviving works looking at the historic financial building designed by architect Benjamin Henry Latrobe. At the time, it was the unofficial bank of the Commonwealth of Pennsylvania that sat at the southwest corner of Fourth and Chestnut streets. The structure was razed in 1836.
Horizontoriums became popular throughout England and France in the 18th century, although this piece is the only one known to be made in America. Viewers would set the lithograph on a flat surface and perpendicularly position their face at the center of the work (note the semicircle on this lithograph suggesting a spot for a chin) to peer over the image. The sharp angle would produce a distorted perspective that appears to project the building and its passersby upward. Sometimes, viewers even would peek through a small hole carved out of paper or cardboard to block out their peripheral vision and give the work a more distinct look. (via Graphic Arts Collection, The Morning News)
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