“It seems on the whole unrelated to its function of the adhān [q.v.] calling the faithful to prayer, which can be made quite adequately from the roof of the mosque or even from the house-top. During the lifetime of the Prophet, his Abyssinian slave Bilāl [q.v.], was responsible for making the call to prayer in this way. The practice continued for another generation, a fact which demonstrates that the minaret is not an essential part of Islamic ritual. To this day, certain Islamic communities, especially the most orthodox ones like the Wahhābīs in Arabia, avoid building minarets on the grounds that they are ostentatious and unnecessary. … It must be remembered, however, that throughout the mediaeval period, the role of the minaret oscillated between two polarities: as a sign of power and as an instrument for the adhān.”