A recent discovery that a painting by the Dutch abstract artist Piet Mondrian (1872-1944) has been exhibited upside down for 75 years has caused quite a stir in the art world. The Art, Law and More blog has details about the finding and artwork titled New York City 1.
I wonder if the detection will change any understanding or perception of the painting (or even the artist) now that it can be viewed from a different perspective?
Sometimes paintings require a degree of rotation, or to be mirrored, in order to convey further information.
Jan Van Eyck was not adverse to using this technique. Neither were Sandro Botticelli and Hugo Van der Goes. Even Rembrandt.
Examples of this approach can be seen at these links.