thumb|upright|Poster advertising the first major exhibition of Escher's work in Britain (Dulwich Picture Gallery, 14 October 2015 – 17 January 2016). The image, which shows Escher and his interest in geometric distortion and multiple levels of distance from reality, is based on his Hand with Reflecting Sphere, 1935.
thumb|upright|Poster advertising the first major exhibition of Escher's work in Britain (Dulwich Picture Gallery, 14 October 2015 – 17 January 2016) The image, which shows Escher and his interest in geometric distortion and multiple levels of distance from real.ity, is based on his Hand with Reflecting Sphere, 1935.