Full Breakdown
Concerns Over Crane Truck Use During Hagia Sophia Restoration
11/25/2025, 3:04:54 AM
Overview of the Situation
Recent images of a heavy truck-mounted crane positioned on the historic marble floor of Hagia Sophia Grand Mosque in Istanbul have sparked public concern regarding the ongoing restoration efforts. Originally built in 537 CE as a Byzantine cathedral, Hagia Sophia has undergone various transformations, serving as a mosque, museum, and again as a mosque since 2020. The current restoration aims to enhance the structure's seismic resilience while preserving its historical integrity.
Public Alarm and Criticism
The photographs showing the crane, which weighs approximately 20–26 tons, raised questions about the adequacy of the protective measures in place for the delicate floor, which features intricate mosaics and ancient marble. Critics have pointed out that the temporary protective panels beneath the crane appear insufficient for distributing the weight of such heavy machinery. Experts have warned that the floor's multi-layered structure, which includes ancient stone slabs and underlying voids, could be at risk of damage from concentrated loads or vibrations.
Official Statements and Responses
In response to the public outcry, Turkish authorities, including Minister of Culture and Tourism Mehmet Nuri Ersoy, have emphasized that the restoration is being conducted with care to ensure the monument's integrity. Ersoy noted that Hagia Sophia is undergoing "the broadest and most comprehensive restoration process in their history," aimed at improving its seismic resilience without obstructing worship activities. The General Directorate of Foundations provided detailed documentation, stating that comprehensive georadar scans and load tests were conducted prior to the crane's deployment. They asserted that a multi-layer protective platform, rated for 30 tons per square meter, was installed to safeguard the original floor.
Technical Safeguards Implemented
According to the Turkish authorities, the heaviest vehicle used during the restoration, weighing approximately 45 tons, exerts only about 6 tons per square meter on the historic surface due to the specialized weight-distribution system in place. The protective measures include layers of felt, silica sand, timber grids, insulation, plywood, and steel sheets, designed to minimize the impact on the underlying structure.
Criticism of Protective Measures
Despite the official assurances, some experts remain skeptical about the effectiveness of the protective measures. They argue that the flat plates used do not adequately distribute the load and suggest that more advanced systems, such as interlocking protective panels combined with beams or steel plates, should be employed to better disperse weight across a wider surface area. An anonymous scientific assessment highlighted the potential risks of long-term deterioration due to the current setup.
Conclusion
The ongoing restoration of Hagia Sophia is a complex endeavor that aims to balance structural integrity with historical preservation. While Turkish authorities maintain that the measures in place are sufficient, the concerns raised by experts and the public underscore the need for continuous scrutiny and adaptation of restoration practices to protect this iconic monument.
