Greco-Bactrians, and briefly the Scythians of the Central Asian Steppe. The region of Gandhara (based in the Peshawar valley and the adjacent hilly regions of Swat, Buner, Dir, and Bajaur), broke away from Greco-Bactrian rule to establish their own independence as the Indo-Greek Kingdom. Following the death of the most famous Indo-Greek king, Menander I around 140 BCE, the region was overrun by the Indo-Scythians, and then the Persian Parthian Empire around 50 CE. The arrival of the Parthians began the long tradition of Greco-Buddhist art, which was a syncretic form of art combining Buddhist imagery with heavy Hellenistic-Greek influences. This art form is credited with having the first representations of the Buddha in human form, rather than symbolically. The Parthians were ousted from Swat by the Kushans, based in the Peshawar valley. Kushan rule began what is considered by many to be the golden age of Gandhara. Under the greatest Kushan king, Kanishka, Swat became an important region for the production of Buddhist art, and numerous Buddhists shrines were built in the area. As a patron of Mahayana Buddhism, new Buddhists stupas were built and old ones were enlarged. The Chinese pilgrim Fa-Hsien, who visited the valley around 403 CE, mentions 500 monasteries. Hephthalite Swat and the wider region of Gandhara were overrun by the Iranian Hephthalites around about 465 CE. Under the rule of Mihirakula, Buddhism was suppressed as he himself became virulently anti-Buddhist after a perceived slight against him by a Buddhist monk. Under his rule, Buddhist monks were reportedly killed, and Buddhist shrines attacked. He himself appears to have been inclined towards the Shaivism sect of Hinduism. In around 520 CE, the Chinese monk Song Yun visited the area, and recorded that area had been in ruin and ruled by a leader that did not practice the laws of the Buddha. The Tang-era Chinese monk Xuanzang recorded the decline of Buddhism in the region, and ascendance of Hinduism in the region. According to him, of the 1400 monasteries that had supposedly been there, most were in ruins or had been abandoned. Hindu Shahi Following the collapse of Buddhism in Swat following the Hephthalite invasion, Swat was ruled by the Hindu Shahi dynasty beginning in the 8th century, who made their capital at Udigram in lower Swat. The Shahis built an extensive array of temples and other architectural buildings, of which ruins remain today. Under their rule,