The kanun is a string instrument played in much of the Middle East, Central Asia, and southeastern Europe. The name derives from the Arabic word kānun, which means "rule, norm, principle" itself from ancient Greek 'κανών' rule. Its traditional music is based on maqamat. It is a type of large zither with a narrow trapezoidal soundboard. Nylon or PVC strings are stretched over a single bridge poised on fish-skins on one end, attached to tuning pegs at the other end.