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 to the sea. The most conspicuous remaining parts of the Castle are the upper tower, or Tower of Homage, together with various terraces and battlements below it, and the massive Gate House, with its cupola roof. The Tower of Homage is the highest tower of the period of Islamic rule in the Iberian Peninsula, and the Qasbah of the Castle is the largest in the area. The Castle itself played a prominent part in the Muslim invasion of the Iberian Peninsula, with Muslim forces overrunning a large portion of it in two years - an invasion which led to Islamic