Iranian Heritage Under Fire in 2026: Persepolis, Isfahan and Yazd — UNESCO Sites Status and Real Risks

From February 28 to April 12: timeline of a heritage catastrophe

On February 28, 2026, a joint US-Israeli military operation targeted Iranian nuclear and military installations. The first strikes hit Tehran, Isfahan, Khuzestan, and other strategic provinces. But the density of Iran’s historical heritage — 27 UNESCO World Heritage sites, thousands of national monuments — makes any bombing campaign inherently dangerous for cultural legacy.

By March 1 and 2, the Golestan Palace in Tehran, a Qajar jewel inscribed on the UNESCO World Heritage List since 2013, suffered collateral damage during strikes on the capital. According to The Art Newspaper, the vibrations from nearby explosions caused cracks in the mirror mosaics and stucco work of the palatial complex.

The toll rose rapidly. By April 10, 2026, the Xinhua news agency reported the figure of 131 historical monuments damaged to varying degrees across 20 Iranian provinces. Among them, at least four UNESCO World Heritage sites sustained confirmed damage — a toll that could worsen as assessment teams gain access to new areas.

The ceasefire negotiated on April 8 by Pakistan offered a few days of respite. But the failure of the Islamabad negotiations on April 11 and 12, reported by NPR, leaves uncertainty hanging over the possible resumption of hostilities — and thus over the fate of sites still intact.

No direct strike, but a creeping danger

Persepolis, the ceremonial capital founded by Darius I around 518 BC, remains to this day the most universal symbol of Iranian civilization. Inscribed on the UNESCO World Heritage List in 1979, this monumental city with its sculpted reliefs, colossal columns, and Apadana staircases has fascinated archaeologists and travelers for two and a half centuries.

As of April 12, 2026, Persepolis has not been directly struck. The site, located in Fars Province about 60 kilometers northeast of Shiraz, has not been hit by bombings. That is the good news. But it is tempered by a less visible and potentially equally destructive danger.

Strikes on Iranian refineries and oil installations — particularly in neighboring Khuzestan and around Isfahan — have caused massive fires and considerable atmospheric pollutant releases. According to analyses reported by The Conversation, these pollution plumes containing soot particles, sulfur compounds, and hydrocarbons pose a chemical threat to the limestone surfaces of Persepolis. Accelerated erosion caused by acid rain and particle deposits could irreversibly alter the Achaemenid bas-reliefs that have survived 2,500 years of natural weathering.

The Blue Shield, the cultural equivalent of the Red Cross, has confirmed the installation of protective emblems on over 100 Iranian sites, including Persepolis. But as a Museums Association report notes, these emblems have only legal value — they stop neither missiles nor pollution.

What Persepolis concretely risks

• Atmospheric pollution — Plumes from bombed refineries in Khuzestan and around Isfahan carry acidic particles over hundreds of kilometers
• Seismic vibrations — High-intensity explosions within 200 km can weaken already eroded structures
• Abandonment of surveillance — Evacuation of conservation staff deprives the site of all preventive maintenance
• Potential looting — Security instability increases risks of clandestine excavations and antiquities trafficking

« Nesf-e Jahan » — The city with the worst damage

« Isfahan, nesf-e jahan » — « Isfahan is half the world. » This four-century-old Persian proverb has never sounded as tragic as in this spring of 2026. The city that was the resplendent capital of the Safavid Empire in the 17th century, the one European travelers said rivaled Paris and Constantinople, is today the epicenter of the conflict’s most severe heritage damage.

Isfahan was targeted due to its proximity to strategic nuclear and military installations. Strikes on these sites, located on the city’s outskirts, produced shockwaves and debris fallout that reached the historic center.

Chehel Sotoun: the pavilion of forty columns, severely damaged

The Chehel Sotoun palace (the « Forty Columns »), inscribed on the UNESCO World Heritage List in 2011 as part of the « Persian Gardens, » suffered what reports describe as the worst heritage damage of the conflict. According to The Art Newspaper, the vibrations from explosions caused the partial collapse of the wooden columned portico and damaged the famous 17th-century wall frescoes depicting battle scenes and royal receptions. The throne room paintings, considered masterpieces of Safavid mural miniature art, show deep cracks and detachment of the pictorial layer.

Ali Qapu and Naqsh-e Jahan: the royal square struck

The Ali Qapu palace, the six-story royal gate overlooking Naqsh-e Jahan Square, also suffered structural damage. This palace, famous for its « music room » with acoustic niches sculpted in the shape of instruments, saw sections of its delicate stucco work detach under the effect of vibrations. Naqsh-e Jahan Square itself, inscribed on the UNESCO list since 1979 and considered one of the largest squares in the world (512 meters long), suffered damage to its merchant arcades.

The Friday Mosque (Masjed-e Jame): 1,300 years of history in danger

The Friday Mosque of Isfahan, inscribed on the UNESCO list in 2012, is one of the oldest religious buildings in Iranian Islam, with architectural elements dating back to the 8th century. This encyclopedic monument, illustrating eleven centuries of Islamic architecture, sustained damage reported by Euronews in the oldest vault areas. The 11th-century Seljuk iwans, among the earliest examples of double-shell brick vaults, show worrying cracks.

• Chehel Sotoun — Portico partially collapsed, Safavid frescoes cracked and detached
• Ali Qapu — Music room stucco detached, structural cracks in upper floors
• Naqsh-e Jahan — Merchant arcades damaged, tile cladding cracked
• Masjed-e Jame — Cracks in Seljuk vaults, localized collapse risk

A millennia-old Zoroastrian heritage threatened by fallout

Yazd is a miracle of human adaptation. Perched at 1,200 meters altitude in the heart of the Iranian desert, this city of 530,000 inhabitants has been inhabited for over 7,000 years. Its inscription on the UNESCO World Heritage List in 2017 recognized what makes it unique: a remarkably preserved adobe urban fabric, punctuated by badgirs (wind towers), qanats (underground irrigation channels), and Zoroastrian fire temples, some of which have maintained a sacred flame for over 1,500 years.

Unlike Isfahan, Yazd’s historic center was not directly hit by bombings. But Yazd Province experienced strikes on military targets, and the city faces the same indirect threats as Persepolis: atmospheric pollution, particle fallout, and interruption of routine maintenance.

Extreme fragility of mudbrick architecture

What makes Yazd particularly vulnerable is the very nature of its building materials. Adobe — a mixture of earth, straw, and water — is an extraordinarily durable material in a dry climate, but extremely sensitive to vibrations and moisture. Pollutant particle fallout, combined with potential acid rain, could accelerate the erosion of structures that have survived millennia of normal desert conditions.

The badgirs, the wind towers that constitute Yazd’s architectural signature, are slender structures particularly vulnerable to vibrations. Some reach 33 meters in height and rest on adobe foundations. According to PBS NewsHour, Iranian assessment teams reported cracks in several wind towers in the historic quarters, although it remains difficult to distinguish conflict-related damage from natural deterioration.

Zoroastrian heritage in limbo

Yazd is home to Iran’s largest Zoroastrian community. The Atash Behram fire temple, which according to tradition has kept a flame burning continuously since 470 AD, is a major pilgrimage site. The Towers of Silence (dakhma), where Zoroastrians once laid their dead, and the Dowlat Abad Garden with its 33-meter badgir — the tallest in the world — complete a heritage ensemble of rare coherence and authenticity.

Iran has deployed 300 assessors across the country to document the damage, but the most remote areas — including some peripheral Zoroastrian sites in Yazd Province — have not yet been inspected. The British Institute of Persian Studies (BIPS) has launched an appeal to international researchers to build a pre-conflict photographic database, essential for future comparative assessments.

From Tehran to Lorestan: an expanding toll

While Isfahan concentrates the most publicized damage, other remarkable sites have been hit across the country. The picture of destruction extends well beyond the usual tourist icons.

Golestan Palace, Tehran

The Golestan Palace, former seat of the Qajar dynasty inscribed on the UNESCO list in 2013, suffered damage from the very first days of the conflict, on March 1 and 2. Located in the heart of Tehran, it was affected by strikes on military and government targets in the capital. The famous mirror mosaics of the Talar-e Brelian (Diamond Hall) and the tilework of the Shams-ol-Emareh (Edifice of the Sun) show damage reported by The Art Newspaper.

Saadabad Palace, Tehran

The Saadabad palatial complex, the summer residence of the last Pahlavi shahs turned museum, also suffered damage. This vast ensemble of 18 palaces and pavilions in the northern foothills of the Alborz housed collections of paintings, carpets, and art objects of considerable value. The extent of damage to the museum collections has not yet been fully assessed.

Falak-ol-Aflak Citadel, Khorramabad

In Lorestan Province, the Falak-ol-Aflak Citadel in Khorramabad, a Sassanid monument from the 3rd century perched on a rocky spur, is among the damaged sites. This fortress, one of the oldest still standing in the world, had survived the Mongol and Timurid invasions. According to Revue Conflits, sections of its walls, several meters thick, show new cracks.

Partial toll: what we know, what we don’t

Iran has 27 properties inscribed on the UNESCO World Heritage List. As of April 12, 2026, at least four of them have confirmed damage. But the figure of 131 damaged national monuments, reported by Xinhua, covers only inspected sites — and vast areas of the country remain inaccessible to assessors due to ongoing military operations.

• Confirmed damaged UNESCO sites — Golestan (Tehran), Chehel Sotoun (Isfahan), Naqsh-e Jahan (Isfahan), Masjed-e Jame (Isfahan)
• Major national sites hit — Ali Qapu, Saadabad, Falak-ol-Aflak, among others
• Sites at indirect risk — Persepolis, Yazd, Pasargadae, Takht-e Soleyman
• Not yet assessed — Dozens of sites in provinces under active military operations

UNESCO, Blue Shield, Hague Convention: an insufficient legal arsenal

The legal framework for protecting cultural heritage in wartime has existed since 1954: the Hague Convention for the Protection of Cultural Property in the Event of Armed Conflict requires belligerents to take all possible measures to spare cultural sites. Iran, the United States, and Israel have obligations to varying degrees under these instruments — Iran and Israel are parties to the Convention, while the United States signed but never ratified it.

In practice, measures taken before and during the conflict proved largely insufficient:

What was done

UNESCO communicated the GPS coordinates of all protected Iranian sites to coalition forces and Iran, in accordance with standard protocol. According to Franceinfo, UNESCO Director-General Audrey Azoulay issued repeated calls for the respect of cultural heritage from the very first day of hostilities.

Blue Shield International, an organization founded in 1996 on the Red Cross model for cultural protection, installed its distinctive emblems — a blue and white shield — on over 100 Iranian sites. According to the March 2026 Blue Shield report, these markings were carried out in coordination with Iranian authorities in the weeks preceding the conflict, when tensions were already at their peak.

Why it was not enough

The reality on the ground shows the limits of these measures. The damage to Isfahan’s sites is essentially collateral: the strikes targeted military installations nearby, but the shockwaves and debris fallout reached the historic monuments. The Hague Convention prohibits directly targeting cultural sites, but it offers little protection against collateral damage when military objectives are located near heritage zones — a frequent situation in Iran, where urban continuity spans millennia.

As reported by Al Jazeera, international jurists have begun examining whether certain damage could constitute violations of international humanitarian law, under the principle of proportionality — which requires that civilian collateral damage not be excessive in relation to the anticipated military advantage.

Archives, the key to future reconstruction

If the fighting stops, reconstruction will be possible — but it will take decades. Experience from previous conflicts (Syria, Iraq, former Yugoslavia) shows that cultural heritage restoration is a slow, costly, and technically demanding process that requires cutting-edge skills and, above all, precise documentation of the sites’ previous condition.

The treasure of Italian-Iranian archives

This is where a little-known legacy could play a decisive role. Between 1964 and 1978, IsMEO (Italian Institute for the Middle and Far East, now ISMEO) conducted, in partnership with Iranian authorities, a vast campaign of documentation and restoration of the country’s main historic sites. These archives — architectural surveys, high-resolution photographs, materials analyses, restoration plans — constitute an irreplaceable resource today.

According to the British Institute of Persian Studies, these Italian archives, preserved in Rome, are the most comprehensive ever produced on pre-revolutionary Iranian heritage. They cover notably Persepolis, Isfahan, Pasargadae, and numerous sites that now figure among the most threatened.

The Iranian mobilization

Iran has deployed 300 assessors across the country to document damage in real time, according to data reported by Xinhua. This documentation work — photographs, measurements, structural surveys — is essential for planning future restoration interventions. But it faces considerable obstacles: limited access to combat zones, power outages affecting digital equipment, and absence of conservation materials for emergency measures (protective tarps, temporary shoring).

How long to restore?

International precedents give an idea of the scale of the challenge. The reconstruction of the Mostar Bridge in Bosnia-Herzegovina took 9 years (1995-2004). The restoration of the Great Umayyad Mosque of Aleppo is still ongoing, more than 10 years after the fighting. For an ensemble as vast and complex as Isfahan’s sites, experts from The Conversation estimate that a full restoration could take 20 to 30 years, at a cost running into hundreds of millions of euros.

• Immediate priority — Emergency stabilization: shoring, protective tarps, consolidation of structures at risk of collapse
• Short term (1-3 years) — Exhaustive damage documentation, restoration plans, international funding appeals
• Medium term (3-10 years) — Restoration of structural elements, training of specialized restorers
• Long term (10-30 years) — Restoration of decorative elements (frescoes, mosaics, tilework), gradual reopening to the public