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
Moorish Castle making it unique in the Iberian Peninsula. Gibraltar has always been of special significance to the numerous peoples and civilizations that have visited or occupied it over the ages, from the Neanderthal period, through the Classical and on to Moorish, Spanish, and the current British rule. The Moorish occupation is by far the longest in Gibraltar's recorded history, having lasted from 711 to 1309 and then again from 1350 to 1462, a total of 710 years. Historical importance of Gibraltar to both Muslims and Christians lies in the fact that the Moorish invasion and occupation of parts of western Europe