He made lavish offerings in Vajrasana, renovated all the temples there and properly rebuilt the upper four storeys of the nine-storied maha-gandola w… - taranatha

At that time there lived in Kashmir a king called Turuska . He lived for a hundred years and was highly religious.... When the charmed circle was found inside the fruit, [the Persian king] became convinced of the use of black magic. So he [the Persian king] destroyed Magadha by the Turuska army, ruined many temples and heavily damaged Sri Nalendra. Even the ordained monks fled away.

The Turushka army conquered the whole of Magadha and destroyed many monasteries; at Nalanda they did much damage and the monks fled abroad.

Skilled image-makers abounded in every place wherever the Law of the Buddha flourished. In the regions that came under the influence of the mlecchas the art of image making declined.