Any of the horse trappings, utensils, weapons, jewelry, belt buckles, and ritual and votive objects of bronze probably dating from roughly 2600-600 BC that have been excavated in the Harsin, Khorramabad, and Alishtar valleys of the Zagros Mountains in the Lorestan region of western Iran, especially at the site of Tepe Sialk. Their precise origin is unknown. Scholars believe that they were created either by the Cimmerians, a nomadic people from southern Russia who may have invaded Iran in the 8th century BC, or by such related Indo-European peoples as the early Medes and Persians. The term denotes a broad region of this metalwork and therefore has little cultural historical meaning.