World Heritage Identification Number: 1537
World Heritage since: 2018
Category: Cultural Heritage
WHE Type: Historic Cities & Urban Areas
Transboundary Heritage: No
Endangered Heritage: No
Country: 🇴🇲 Oman
Continent: Asia
UNESCO World Region: Arab States
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The Ancient City of Qalhat: A Testimony to Trade Links Across Continents
The Ancient City of Qalhat, situated on the eastern coast of Oman, offers a captivating glimpse into the rich history of trade connections that spanned continents during the 11th to 15th centuries CE. Inscribed as a UNESCO World Heritage Site in 2018, this ancient city played a pivotal role as a major port on the east coast of Arabia, fostering economic ties with regions such as East Africa, India, China, and Southeast Asia.
More to come…UNESCO Description of the World Heritage Site
The property, which is located on the east coast of the Sultanate of Oman, includes the ancient city of Qalhat, surrounded by inner and outer walls, as well as areas beyond the ramparts where necropolises are located. The city developed as a major port on the east coast of Arabia between the 11th and 15th centuries CE, during the reign of the Hormuz princes. The Ancient City bears unique archaeological testimony to the trade links between the east coast of Arabia, East Africa, India, China and South-East Asia.
UNESCO Justification of the World Heritage Site
Criterion (ii): Qalhat exhibits the cultural and commercial interchange of values within the trading range of the Kingdom of Hormuz, which extended to India and as far as China and South East Asia. The archaeological site of Qalhat provides physical evidence of these interchanges, documenting the architectural features which indicate its own produce, dates, Arabian horses as well as spices and pearls but also integrating the multi-cultural features of a medieval cosmopolitan city, with houses influenced by the needs of their various owners and inhabitants of foreign cultural origin. The ancient city also includes a number of highly representative buildings which were references in narratives authored by historic travellers.
Criterion (iii): The Ancient City of Qalhat presents a unique testimony to the Kingdom of Hormuz, as it prospered from the 11th to 16th century CE. Ancient Qalhat presents exceptional evidence of a major trade hub, which came under the rule of the Princes of Hormuz and profited from its geo-political position in the region. It was a seasonal residence and refuge to the Princes of Hormuz, which has given it the title of a secondary capital of the larger kingdom. The urban plan and the excavated buildings of Qalhat show features and characteristics specific to the Kingdom of Hormuz and the archaeological remains are its most complete representation and provide further potential for a more detailed understanding of its ways of life and trade.
Encyclopedia Record: Qalhat
Qalhāt is a village in Oman, over 20 km north of Sur. The residential area is to the northwest of Wādī Ḥilm, and the ruins of the ancient city are located to the southeast. The ancient city is referred to as Calatu by Marco Polo and as Calha in the map of Abraham Ortelius.Additional Site Details
Area: 75.82 hectares
Number of Components: 1
(iii) — Unique or exceptional testimony to a cultural tradition
Coordinates: 22.6952222222 , 59.3781111111
Image
© Francesco Bini, CC BY-SA 4.0 Resized from original. (This derivative is under the same CC BY-SA license.)
World Heritage Research
Discover scientific research and academic studies that deepen our understanding of Ancient City of Qalhat from its history and significance to its conservation, management, and contemporary challenges.
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SWAC: Sea Water Air Conditioning potential for sustainable energy saving cooling sultanate of Oman 2010–2025
Seawater Air Conditioning (SWAC) emerges as a viable solution for sustainable cooling in Oman, offering significant energy savings and reduced carbon emissions. A techno-economic evaluation at the Al Jissah-Yitti site in Muscat demonstrated that implementing a 15,000 TR SWAC system could slash power consumption to just 1 MW compared to conventional air conditioning, with a levelized cost of energy (LCOE) of $0.019/kWh, a return on investment of 26.7%, and a payback period of 4.6 years. Similar benefits were projected for a proposed datacenter in Quriyat/Qalhat, with potential net-zero emissions and 70% lower operational expenses (OPEX) than conventional cooling systems. This pioneering study assesses SWAC's feasibility, technical viability, and economic potential in Oman, marking the first comprehensive analysis of its kind in the region and supporting Oman's net-zero emission goals by 2050.
Alzeedi, J. S., & Katz, Eng. M. (2026). SWAC: Sea Water Air Conditioning potential for sustainable energy saving cooling sultanate of Oman 2010–2025. Frontiers in Sustainable Cities, 8. https://doi.org/10.3389/frsc.2026.1745199
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Qalhat, A Medieval Port City of Oman. From a field of ruins to UNESCO
Qalhat, once a bustling medieval port city in Oman (11th–16th century), has been revealed through nine years of interdisciplinary archaeological research (2008–2016) led by Axelle Rougeulle (CNRS) and supported by Oman's Ministry of Heritage. The Qalhat Project uncovered the city's significance as a key maritime hub, blending historical, architectural, and environmental analyses to reconstruct its rise, peak, and decline. Findings highlight advanced urban planning, trade networks spanning the Indian Ocean, and the city's eventual abandonment due to shifting economic dynamics. This monograph synthesizes extensive fieldwork, offering insights into Qalhat's transformation from a ruin-strewn site to a UNESCO World Heritage Site, underscoring its cultural and historical importance.
Chung-To, G. (2025). Qalhat, A Medieval Port City of Oman. From a field of ruins to UNESCO. Bulletin Critique Des Annales Islamologiques, 39. https://doi.org/10.4000/13v4z
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Seismic catastrophes in historical times in Arabia – Destruction of the city of Qalhat (Oman) in the 16th century
Historical records and archaeoseismological analysis reveal two devastating earthquakes that struck the ancient city of Qalhat, Oman, over 300 km from active plate boundaries. The first earthquake, estimated to have a magnitude of Mw 5.5 in 1497 AD, caused significant damage (intensity VII) but was repaired. A second, far more destructive quake (magnitude Mw 6.5–7.0, intensity X-XI) between 1580 and 1592 left the city in ruins, from which it never recovered. The study suggests that the Tiwi Fault or Qalhat Fault may have been responsible for these seismic events, challenging the perception of Arabia's interior as earthquake-free.
Kázmér, M., Gaidzik, K., Al-Tawalbeh, M., Steinritz, V., Reicherter, K., & Hoffmann, G. (2023). Seismic catastrophes in historical times in Arabia – Destruction of the city of Qalhat (Oman) in the 16th century. Quaternary International, 664, 42–58. https://doi.org/10.1016/j.quaint.2023.05.016
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Ship Timbers from the Islamic Sites of al-Balid and Qalhat, Oman: Sewn-plank technology in the Indian Ocean during the 10-16th centuries CE
A groundbreaking analysis of ship timbers from the Islamic sites of al-Balid and Qalhat, Oman, reveals advanced sewn-plank technology used in Indian Ocean maritime trade between the 10th and 16th centuries. This study challenges long-standing Orientalist narratives by demonstrating that medieval shipbuilding in the region was sophisticated and independent, debunking the myth of European technological superiority. Using a multidisciplinary approach—combining material analysis with textual, iconographic, ethnographic, archaeological, and experimental evidence—the research reconstructs the design and operation of these sewn-plank ships, providing new insights into their role in connecting East Africa, Arabia, India, and China. The findings enrich our understanding of medieval maritime communities and their technological achievements.
Ghidoni, A. (2023). Ship Timbers from the Islamic Sites of al-Balid and Qalhat, Oman: Sewn-plank technology in the Indian Ocean during the 10-16th centuries CE. https://doi.org/10.30861/9781407360577
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Qalhat, a Medieval Port City of Oman
The medieval port city of Qalhat, Oman, has been revealed as a wealthy, cosmopolitan metropolis through extensive archaeological research initiated in 2008. This study uncovered the city's plan and chronology, identifying key structures such as mosques, fortifications, and water supply systems, including the Great Mosque built by Bibi Maryam around 1300. Excavations also reconstructed Qalhat's craft and economic activities, as well as its regional and international commercial links, highlighting its significance during the 13th to 16th centuries. These findings underscored Qalhat's Outstanding Universal Value, leading to its inscription on the UNESCO World Heritage List in 2018.
Axelle, R. (Ed.). (2023). Qalhat, a Medieval Port City of Oman. https://doi.org/10.32028/9781803275932
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Echinoderm Diversity in the Arabian Sea and the Sea of Oman
A comprehensive survey of Oman's coastal habitats unveiled a richer echinoderm biodiversity than previously anticipated, with 75 species documented across four classes: holothuroids (21), echinoids (20), crinoids (6), and asteroids (28). Notable discoveries include the first observation of Holothuria nobilis north of the Red Sea and Holothuria arenacava near Muscat, alongside the life record of the starfish Ferdina sadhensis. The study also identified several unidentified specimens, hinting at potential new species. A significant shift in echinoderm community structure was observed at Ras-Al-Hadd, suggesting either environmental changes or a bio-geographic barrier limiting species dispersal. Conducted across five regions—Musandam, Capital area, Sur-Qalhat, Masirah, and Dhofar—the survey provides critical insights into the marine biodiversity of the Arabian Sea and Sea of Oman.
Claereboudt, M. R., & Alrashdi, K. M. (2022). Echinoderm Diversity in the Arabian Sea and the Sea of Oman. Biodiversity Journal, 13(1), 65–71. https://doi.org/10.31396/biodiv.jour.2022.13.1.65.71
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Qalhat-Hurmuz: Its Place in the History and Economy of the Western Indian Ocean in the Later Middle Ages
A study challenges the widely accepted narrative of early Shirazi migration to East Africa, proposing instead that the so-called 'Shirazi legend' emerged during the 12th to 15th century Hormuz-Qalhat period. This conclusion is supported by a comprehensive analysis of pottery assemblages and settlement patterns across the western Indian Ocean, from Makran/Baluchistan to Kilwa. The research reveals a significant rise in settlement activity, peaking in the 14th (43 sites) and 15th centuries (53 sites), indicating a thriving trade network centered around Hormuz and Qalhat. This finding reshapes our understanding of socio-economic and political dynamics in the region during this period.
al-Salimi, A. (2021). Qalhat-Hurmuz: Its Place in the History and Economy of the Western Indian Ocean in the Later Middle Ages. Studi Maġrebini, 19(2), 324–352. https://doi.org/10.1163/2590034x-12340056
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