page_title: Anamorphosis
section_title: 17th century
hierarchical_section_title: Anamorphosis / History / 17th century
context_page_description: Anamorphosis is a distorted projection or perspective requiring the viewer to occupy a specific vantage point, use special devices or both to view a recognizable image. Some of the media it is used in are painting, photography, sculpture and installation, toys, and film special effects. The word "anamorphosis" is derived from the Greek prefix ana‑, meaning "back" or "again", and the word morphe, meaning "shape" or "form". An oblique anamorphism is the visualization of a mathematical operation called an affine transformation. The process of extreme anamorphosis has been used by artists to disguise caricatures, erotic and scatological scenes, and other furtive images from a casual viewer, while revealing an undistorted image to the knowledgeable spectator.
context_section_description: By the 17th century, a revival of fantastical anamorphic imagery occurred. Magical and religious connotations were largely abandoned, and the images were understood as a scientific curiosity. Two major works on perspective were published: Perspective (1612) by Salomon de Caus, and Curious Perspective (1638) by Jean-Francois Niceron. Each contained extensive scientific and practical information on anamorphic imagery. In Niceron's work, three types of large-scale anamorphism are explained: 'optical' (looking horizontally); 'anoptric' (looking upwards); and 'catoptric' (looking down i.e. from a mezzanine). A conical perspective is also described. Towards the end of the century, Charles Ozanam's Mathematical Recreations widely popularized the techniques for the creation of anamorphic images.
  Between 1669 and 1685, both perspective and mirror anamorphosis were introduced in China by the Jesuits to the Emperor K'ang-hi and monks at the Peking Mission. However, Chinese production of anamorphic images were already occurring on a large scale during the late Ming Dynasty. The images were mostly created freehand, unlike the grid system used in the west. As Chinese anamorphoses primarily focused on erotic themes, Jesuit influence is unlikely. It is considered likely that Chinese catoptric techniques, which are technically unrelated to geometric anamorphosis, influenced European mirror anamorphosis, and not the other way around.
  Baroque trompe l'oeil murals often used anamorphism to combine actual architectural elements with illusory painted elements to create a seamless effect when viewed from a specific location. The dome and vault of the Church of St. Ignazio in Rome, painted by Andrea Pozzo, represented the pinnacle of illusion. Due to neighboring monks complaining about blocked light, Pozzo was commissioned to paint the ceiling to look like the inside of a dome, instead of building a real dome. As the ceiling is flat, there is only one spot where the illusion is perfect and a dome looks undistorted.
  Anamorphosis could be used to conceal images for privacy or personal safety, and many secret portraits were created of deposed royalty. A well-known anamorphic portrait of the English King Edward VI was completed a year before his death in 1546, only visible when viewed through a hole in the frame. It was later hung at Whitehall Palace, and may have influenced Shakespeare during the writing of Richard II. Many anamorphic portraits of King Charles I were created and shared following his 1649 execution.  A secret mirror anamorphosis portrait of Bonnie Prince Charlie, held at the West Highland Museum, can only be recognized when a polished cylinder is placed in the correct position. To possess such an image would have been seen as treason in the aftermath of the 1746 Battle of Culloden.
caption: Andrea Pozzo's painted ceiling in the Church of St. Ignazio, 1690
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