How Nepal Repaired Earthquake-Damaged Heritage: 2015 Reconstruction

On 25 April 2015 (12 Baishakh 2072 BS), a magnitude 7.8 earthquake struck near Gorkha, followed by a major aftershock on 12 May. Beyond the roughly 9,000 lives lost, the quake devastated Nepal's built heritage, hitting the temple squares of the Kathmandu Valley hardest. According to the Department of Archaeology (DoA), more than 1,000 heritage structures were damaged across Kathmandu, Lalitpur, Bhaktapur, Nuwakot, Gorkha and other districts.

The seven monument zones that make up the Kathmandu Valley UNESCO World Heritage Site suffered severe losses. Around 90 percent of the structures in Hanuman Dhoka (Kathmandu) Durbar Square were damaged, and more than 140 monuments of historical and cultural significance were reduced to rubble, including the nineteenth-century Dharahara tower and parts of Changu Narayan. Iconic buildings such as Kasthamandap, the Maju Dega temple and Bhaktapur's Vatsala temple collapsed entirely.

The scale of loss forced an urgent question that shaped everything that followed: should Nepal rebuild quickly with modern steel and concrete, or rebuild faithfully in the traditional materials and forms that gave these monuments their outstanding universal value? The answer, codified in the 2016 guidelines, was decisively the latter.

To bring order to reconstruction, the Government of Nepal, through the Department of Archaeology under the Ministry of Culture, Tourism and Civil Aviation, enacted the 'Basic Guidelines on Conservation and Reconstruction of Heritages Damaged by Earthquake, 2016' on 20 August 2016 (roughly 4 Bhadra 2073 BS). The document classified physical cultural heritage into three categories, heritage sites, monuments and objects, all falling under the DoA's jurisdiction, and set out how each should be conserved.

The single most important principle is that renovation and reconstruction must be carried out 'on the basis of available evidence, not on hypothetical speculation'. In practice this means measured drawings, old photographs, salvaged original components, and archaeological findings must guide any rebuild, so that a reconstructed monument reflects its documented historic form rather than a designer's guess. Where evidence is missing, conjectural additions are discouraged.

The guidelines also require authorities to 'adopt traditional construction materials, technologies and techniques as far as possible', and to ensure the participation of local communities in decisions about heritage of all types. The DoA is empowered to receive and mobilise financial and technical resources for conservation. These provisions build on Nepal's older legal framework, principally the Ancient Monuments Preservation Act, 1956, which protects structures over 100 years old and requires them to be preserved in their original form.

Long before modern archaeology, Nepal's monuments were maintained by the Guthi system, a network of community trusts, mostly among the Newar people, that dates back to the Lichhavi era (roughly the 5th to 8th centuries CE). A Guthi was traditionally endowed with land; the income from that land funded temple upkeep, ritual worship, festivals (jatras) and periodic renovation. In effect, the Guthi turned heritage conservation into a self-financing, hereditary community obligation.

This model was gradually weakened by the state. The Guthi Sansthan (Guthi Corporation) Act of 1964 nationalised much Guthi land under a government corporation, and later land reforms eroded the trusts' independent income. Critics argue that as Guthi authority declined, so did the everyday maintenance that had kept monuments in good repair. When the government tabled a Guthi Bill in 2019 proposing further state control, mass protests by Newars in the Kathmandu Valley forced its withdrawal.

The 2016 guidelines' emphasis on local participation is, in part, a recognition that communities and their Guthis hold the living knowledge, the carving skills, the ritual calendar and the sense of ownership, that formal state agencies cannot replicate. The most successful post-2015 rebuilds were those that partnered with, rather than bypassed, these communities.

Kasthamandap, the vast wooden pavilion in Maru that many believe gave Kathmandu its name, was among the most painful losses of 2015. When the DoA initially proposed rebuilding it using steel and concrete on a contract basis, there was a strong public outcry. A community-led 'Campaign to Rebuild Kasthamandap' formed to insist that the monument be reconstructed in its original timber and brick, using traditional Newar craftsmanship rather than modern shortcuts.

The community prevailed. Reconstruction used timber sourced from forests in Bardibas, Mahottari, Rautahat and Sarlahi, and suitable clay for bricks and mortar identified locally, with master Newar carvers reproducing the pillars, struts, window panels and carvings. Post-earthquake excavations, led by the DoA with UNESCO-supported teams from Durham University and the University of Stirling, radiocarbon and OSL dating placed the original structure as early as the 7th century CE, centuries older than long assumed, and revealed that three of the four main pillars had originally sat on stone saddle bases while one had not.

That archaeological evidence directly shaped the rebuild, allowing the foundations and pillar seating to be corrected in line with documented history rather than guesswork, exactly the evidence-based principle the guidelines demand. Reconstruction of Kasthamandap was completed in 2022, and the pavilion reopened as a working symbol that Nepali communities could raise their heritage from the rubble through collective effort.

Nepal's traditional builders, working in a highly seismic zone, evolved a repertoire of features that let heavy masonry-and-timber temples survive shaking. Rather than resisting an earthquake rigidly, these techniques let a building flex, dissipate energy, and stay standing. This is why conserving traditional detailing, not just traditional appearance, matters for safety as well as authenticity.

Key features include tiered stepped plinths that raise the tower on a broad, stable base and help redistribute shear forces away from the foundation; horizontal timber bands and corner ties bedded into the brick walls to hold masonry together and stop it splitting; and brick-timber bonding, in which timber elements are keyed into the walls so that flexible wood and stiff brick work together. Mud mortar (rather than brittle cement), close-fitted 'dachi apa' facing bricks, ductile and appropriately sized timber members with strong but flexible joints, and lightweight timber-and-tile roofs all reduce the forces a building must carry.

Bhaktapur's five-storeyed Nyatapola temple, completed in 1702 (1759 BS), is the classic example. Set on a tall, stepped ziggurat-like plinth about nine metres high, it combines this base with a triangulated, flexing timber-and-brick tower. That combination behaves somewhat like base isolation, separating the sacred tower from the worst of the ground movement. Nyatapola came through the great 1934 Nepal-Bihar earthquake and the 2015 Gorkha earthquake without significant structural damage, a standing argument for the durability of traditional design.

Kasthamandap was not an isolated case. Across the three Durbar Squares, monuments such as Bhaktapur's Vatsala temple, Kathmandu's Maju Dega, temples in Patan Durbar Square, and structures at Hanuman Dhoka were reconstructed over the decade following the earthquake, many with technical and financial support from foreign partners and the DoA. The pace was often criticised as slow, but the deliberate approach reflected the guidelines' priority of accuracy over speed.

Reconstruction has not been free of controversy. Heritage experts have repeatedly warned against creeping use of concrete cores, steel reinforcement or non-original materials that compromise both authenticity and, sometimes, the very flexibility that makes traditional structures earthquake-resilient. Disputes over whether to rebuild vanished monuments (for which little evidence survives) also test the 'evidence, not speculation' rule, since rebuilding without documentation risks producing a plausible fake rather than a restored monument.

The broad lesson of the post-2015 decade is that Nepal's most credible reconstructions succeeded by aligning three things: the legal principle of evidence-based, traditional rebuilding; the deep craft and land-based custodianship of the Guthi and local communities; and the engineering wisdom already embedded in tiered plinths, timber banding and brick-timber bonding. Together these turned recovery from the earthquake into a reaffirmation of Nepal's living heritage.