The key elements of a mosque include the minaret, prayer hall, mihrab, and minbar. The minaret is a tall tower usually found at a mosque's corner which serves as a visual focal point and is used to call people to prayer. The large central prayer hall contains no furniture as worshippers pray directly on the floor. It also houses copies of the Quran along the walls. The mihrab is an ornamented niche on the wall that indicates the direction of Mecca. The minbar is a raised pulpit located beside the mihrab where the imam may deliver sermons. An ablution place allows worshippers to wash parts of their body before prayer.