text: A mihrab ( maharib ) is semicircular niche in the wall of a mosque that indicates the qibla ; that is , the direction of the Kaaba in Mecca and hence the direction that Muslims should face when praying .
simplified: The Mihrab is a niche in the wall of a mosque . It indicates the qibla ( the direction of the Kaaba in Mecca , the direction that Muslims should face when praying ) .