Mihrab (Prayer Niche). Iran, 14th Century.

This prayer niche, or mihrab, was originally set into the qibla wall of a theological school in Isfahan, now known as the Madrasa Imami, built just after the collapse of the Ilkhanid dynasty. The mihrab was created by joining a myriad of cut glazed tiles to produce its intricate arabesque and calligraphic designs. The result is one of the earliest and finest examples of mosaic tilework.