A short, uncertain ending
The popular version is simple: a Turkic commander burned Nalanda to the ground around 1200 and Buddhism in India collapsed soon after. The real picture is more cautious. Nalanda did suffer violence in this period, but the written evidence is sparse, and historians disagree about the details. This article lays out what is reasonably established and where the record is unclear.
What the sources say
The main contemporary-style source is a Persian chronicle, the Tabaqat-i Nasiri, written by Minhaj-i-Siraj in the thirteenth century. It describes a raid in Bihar led by Muhammad Bakhtiyar Khalji, in which a fortified place full of shaven-headed Brahmans, as the author puts it, was taken and a large library was found. The author seems to have meant Buddhist monks, and he writes some decades after the event, drawing on what he heard.
Two difficulties follow. First, the chronicle does not name Nalanda. Many scholars link the account to a nearby monastery, often identified as Odantapuri, while others think Nalanda was also hit, or that sources blur the two. Second, the dates are approximate. Most writers put the raids in the 1190s or very early 1200s.
Tibetan sources give a different angle. A Tibetan pilgrim named Dharmasvamin, who visited Bihar in the 1230s, described Nalanda as damaged but still occupied, with a small group of monks and an elderly teacher still giving instruction. If that account is accurate, Nalanda did not simply vanish in a single night.
The legend of the burning library
A famous story says that the library burned for months because it held so many manuscripts. This claim appears in later retellings and has no clear support in the earliest sources. Whether there was a fire and how large it was remain open questions, which is why careful historians treat the dramatic figures as legend. The library tradition itself is discussed in our article on the Nalanda library.
A longer decline
Violence was probably only part of the story. Several factors are often discussed:
- The Pala dynasty, long the main patron of Buddhist monasteries in Bihar, weakened in the twelfth century.
- Royal and lay support increasingly went to Hindu temples and other institutions.
- Many large Buddhist centres relied on endowments that were disrupted by political upheaval.
- Monks, including leading scholars, moved to Nepal, Tibet and elsewhere.
Historians weigh these factors differently, and it would be misleading to assign a single cause. For the earlier rise of the institution, see the broader overview of ancient Nalanda.
Forgotten and found again
After the thirteenth century, the site was gradually buried, and memory of its exact location faded in the region, though local legends continued around the mounds near the village of Baragaon. Chinese pilgrim accounts, which describe the monastery in detail, later became essential for identification.
In the early nineteenth century, the surveyor Francis Buchanan-Hamilton recorded the large mounds near Baragaon and suggested a link to Nalanda. In the 1860s, Alexander Cunningham examined the area and made a stronger case, matching the distances and descriptions given by Xuanzang and Yijing. Nalanda’s identification, then, rests on a combination of textual descriptions and later inscribed seals found on site, including seals that bear the name of the monastery.
Systematic excavation began in the 1910s under the Archaeological Survey of India and continued across the following decades, with further work later in the twentieth century. The excavations revealed several layers of building, burnt areas in some places, and many objects. Burnt deposits support the idea that there was destruction at some stage, though dating each layer is complicated.
Why this matters for visitors
Standing in the ruins, it is natural to look for a single dramatic cause of the ruin. The better lesson is that institutions fade through many pressures, and that historians continue to refine the evidence. The rediscovery of Nalanda also belongs with other stories of archaeological rediscovery, such as the finding of Sarnath, where early surveys and later digs reshaped understanding.
If you visit, check current access arrangements with official sources, behave respectfully at what is both an archaeological site and a place important to many Buddhists, and be careful with strong claims you read on signboards and websites, as these sometimes simplify a debated history.