Regular Division of the Plane Regular Division of the Plane Regular Division of the Plane is a series of drawings by the Dutch artist M. C. Escher which began in 1936. These images are based on the principle of tessellation, irregular shapes or combinations of shapes that interlock completely to cover a surface or plane. The inspiration for these works began in 1936 with a visit to the Alhambra, a fourteenth-century Moorish castle near Granada, Spain. Escher had visited the Alhambra once before in 1922 but in this visit he had spent several days studying and sketching the ornate tile designs there. In 1958 Escher
3851 Alhambra According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, "Alhambra" measures 6.5 and 6.8 kilometers in diameter and its surface has an albedo of 0.218 and 0.242, respectively, while the "Collaborative Asteroid Lightcurve Link" assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of this orbital family – and calculates a diameter of 6.5 kilometers with an absolute magnitude of 13.1. This minor planet was named for the Alhambra ("the red one"), the famous medieval palace and fortress complex of the Moorish emirs, located in Granada,