The studies in this collection comprise a series of explorations into the
revolutionary character of the Almohad movement in medieval North Africa and
Spain and how it was expressed, including through compelling visual and auditory
means. Almohad silver coins were minted square instead of round, and they
carried no date, as if to indicate that a new era had begun. The new age was
symbolized in the texts appearing on the coins, reminding Muslims that "God is
our Lord, Muhammad is our Prophet, the Mahdi is our imam", and that a new
caliphate had begun. Almoravid mosques were purified and attempts were made to
correct their orientation