The earliest archeological evidence of Buddhism in Gujarat dates back to Emperor Ashoka's reign (269–232 BC). Saurashtra (known as Surashtra/ Saraostes/Syrastene in the past) finds a mention in early Buddhist literature such as the Indriya Jataka, Milinda Panha, Petavatthu, etc. In the sixth century, Bhattarkka, a general of the Gupta Emperors, established an independent principality around Valabhi (Vallabhipur). He was a devout Shaivite but the Maitraka rulers that followed him, though Hindus themselves were great patrons of Buddhism. On his visit to Gujarat in 640 AD, Chinese traveller Hiuen Tsang noted the presence of 200 monasteries housing 10,000 monks at Bharuch, Atali, Kheta, Valabhi, Anandapura and Surashtra. Both Hinayana and Mahayana Buddhism were prevalent in Gujarat.