word for "scratched"). In this technique, square panels were glazed in a black colour and the glaze was then chipped away around the desired motif, leaving the Arabic inscription and other decorative flourishes in black relief against a bare earth ground. Occasionally the earth background is covered with a white coating, and on some occasions a green glaze is used instead of black in order to leave a green motif in relief. An example of the latter is seen on the ceramic decoration of the minaret of the Bou Inania Madrasa in Fez (1350–1355), within the sunken spaces of the sebka motif. Later history (16th century and after) In the 16th century most of North Africa came under Ottoman rule. In Algeria, the indigenous zellij style was mostly supplanted by small square tiles imported from Europe – especially from Italy, Spain, and Delft – and sometimes from Tunis. Some examples of more traditional mosaic tiles found in this late period may have continued to be produced in Tlemcen. In Tunisia, another style of tile decoration, Qallaline tiles, became common during the 18th century and was produced locally. It consisted of square panels of fixed size, painted with scenes and flowers, in a technique similar to Italian maiolica rather than to the earlier mosaic technique. In Spain, where former Muslim-controlled territories had come under Christian rule, new techniques of tilemaking developed. As wealthy Spaniards favoured the Mudéjar style to decorate their residences, the demand for mosaic tilework in this style increased beyond what tilemakers could produce, requiring them to consider new methods. Towards the late 15th and early 16th centuries Seville became an important production center for a type of tile known as cuenca ("hollow") or arista ("ridge"). In this technique, motifs were formed by pressing a metal or wooden mould over the unbaked tile, leaving a motif delineated by thin ridges of clay that prevented the different colours in between from bleeding into each other during baking. This was similar to the older cuerda seca technique but more efficient for mass production. The motifs on these tiles imitated earlier Islamic and Mudéjar designs from the zellij mosaic tradition or blended them with contemporary European influences such as Gothic or Italian Renaissance. Fine examples of these tiles can be found in the early 16th-century decoration of the Casa de Pilatos in Seville. This type of tile was produced well into the