"Relativity", 1953 (lithograph) by M.C. Escher This is perhaps Escher's best-known print on the theme of relativity. It also is a fine example of Escher's focus on unusual, and often conflicting, points of view.
Bird And Fish Pattern - Optical Illusion M C Escher Art Wallpaper Picture
The Amazing World of MC Escher: 14 Oct 2015 – 17 Jan 2016 - Exhibitions - What to see - Art Fund