"After more than seven hundred years of successful teaching, Nalanda was destroyed in the 1190s by invading armies from West Asia, which also demolished the other universities in Bihar. The first attack, it is widely believed, was led by the ruthless Turkic conqueror Bakhtiyar Khilji, whose armies devastated many cities and settle- ments in North India. All the teachers and monks in Nalanda were killed and much of the campus was razed to the ground. Special care was taken to demolish the beautiful statues of Buddha and other Buddhist figures that were spread across the campus. The library—a nine-story building containing thousands of manuscripts—is reputed to have burned for three days."