Sur

The curtain wall — the continuous perimeter wall of a fortified settlement, a granary, or a palace compound. In the southern Moroccan ksar the sur is typically a battered pisé wall one to three metres thick at the base, rising six to twelve metres, sometimes with rounded or square towers at intervals and a single fortified gate. The Tamazight agadir refers to the same enclosing wall but is also used metonymically for the whole granary structure it encloses, which is the source of the typological term.