Central mihrab, Adina Mosque; West Bengal, India. Photograph: Amitabha Gupta (2018), Wikimedia Commons

A niche in the wall of a mosque which indicates the qibla (direction of the Kaaba in Mecca) and is usually covered by a wall hanging. Some of the earliest niches were constructed in Damascus and Mecca during the eight century CE, under the reign of the Umayyad caliph al-Walid I. From the Old South Arabian mhrb (palace) or the Ethiopian mekwrab (temple or sanctuary).