old men professing Buddhism, however, he "saw none among the learned". According to Randall Collins, Buddhism was already declining in India by the 12th century, but with the pillage by invaders it nearly became extinct in India in the 1200s. In the 13th century, states Craig Lockard, Buddhist monks in India escaped to Tibet to escape Islamic persecution; while the monks in western India, states Peter Harvey, escaped persecution by moving to south Indian Hindu kingdoms that were able to resist the power. Brief accounts and the one eye-witness account of Dharmasmavim in wake of the conquest during the 1230s talk about abandoned viharas being used as camps by the Turukshahs. Later historical traditions such as Taranatha's are mixed with legendary materials and summarised as "the Turukshah conquered the whole of Magadha and destroyed many monasteries and did much damage at Nalanda, such that many monks fled abroad" thereby bringing about a demise of Buddhism with their destruction of the Viharas. While the sacked the Buddhists viharas, the temples and stupas with little material value survived. After the collapse of monastic Buddhism, Buddhist sites were abandoned or reoccupied by other religious orders. In the absence of viharas and libraries, scholastic Buddhism and its practitioners migrated to the Himalayas, China and Southeast Asia. The devastation of agriculture also meant that many laypersons were unable to support Buddhist monks, who were easily identifiable and also vulnerable. As the Sangha died out in numerous areas, it lacked the ability to revive itself without more monks to perform ordinations. Peter Harvey concludes: Fogelin also notes that some elements of the Buddhist sangha moved to the Himalayas, China, and Southeast Asia, or they may have reverted to secular life or become wandering ascetics. In this environment, without monasteries and scholastic centers of their own, Buddhist ascetics and laypersons were eventually absorbed into the religious life of medieval India. Survival of Buddhism in the Indian subcontinent Buddhist institutions survived in eastern India right until the Islamic invasion. Buddhism still survives among the Barua (though practising Vaishnavite elements), a community of Bengali Magadh descent who migrated to Chittagong region. Indian Buddhism also survives among Newars of Nepal, who practice unique form of Vajrayana known as Newar Buddhism and among the weavers of the villages of Maniabandha and Nuapatna in the Cuttack District of Odisha, a region that had been isolated for long. In Bihar and Bengal, many