The Great Mosque of Tinmal is located on c. 1270 m altitude in the High Atlas. From here, the Almohad (al Muwahhidun) reform movement began in the 12th century.
See the standard work of Christian Ewert and Jens Wishak, Die Moschee von Tinmal [The Mosque of Tinmal]. 2 volumes of text and plates (Forschungen z. almohadischen Moschee; Lieferung 2. With a contribution by Manuel Ocaña Jiménez. Mainz 1985