M.C.Escher 4
Escher produced '8 heads' in 1922 - a hint of things to come. You can immediately see 4 different heads but the others are not apparent until the picture is turned upside-down
Click here to turn it
Also in this year, he took a boat trip to Spain and went to the Alhambra where, as we have seen he copied many of the tiling patterns.