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Most mosques have one or more towers, called minarets, from which a muezzin calls Muslims to prayer. The earliest building to bear structures specifically built as minarets was Egypt’s Mosque of Amr. Built in 643 CE, it possessed four square towers at its corners. Not all minarets are square, however; there are also octagonal, cylindrical, and conical minarets. Styles vary regionally and by period. How many times does the muezzin issue the call to prayer each day? Discuss
Source: The Free Dictionary