The Hagia Sophia, a sixth-century architectural landmark in Istanbul, lost its status as a museum and was reconverted into a functioning mosque in July 2020. The decision followed a ruling by Turkey’s Council of State, which annulled a 1934 cabinet decree that had transformed the Byzantine-era cathedral into a secular institution.
Legal Basis for the Reconversion
The transition from museum to mosque was triggered by a legal challenge brought by the Permanent Foundations Service to Historical Artifacts and Environment Association. The plaintiffs argued that the 1934 conversion was unlawful, asserting that the structure’s founder, Sultan Mehmed II, had endowed the site exclusively as a mosque.
In its unanimous decision, the Council of State—Turkey’s highest administrative court—determined that the property was registered in the land registry as a mosque and that this status could not be legally altered. Following the court’s ruling, President Recep Tayyip Erdoğan signed a presidential decree transferring the management of the Hagia Sophia to the Presidency of Religious Affairs, or Diyanet, effectively authorizing Islamic prayer services within the building.
UNESCO World Heritage Status
The site, which is part of the “Historic Areas of Istanbul,” has been inscribed on the UNESCO World Heritage list since 1985. The organization’s World Heritage Committee expressed “grave concern” regarding the change in status, noting that the decision was made without prior notification or consultation.
UNESCO maintains that the Hagia Sophia’s status as a museum served as a symbol of dialogue and secular governance, reflecting the building’s complex history as both a cathedral and a mosque. The organization has repeatedly requested that Turkish authorities provide updates on the state of conservation and the management of the site’s Byzantine-era mosaics and architectural features. In response, Turkish officials have asserted that the building remains open to all visitors and that the preservation of its historical and religious integrity is a domestic priority.
International Diplomatic Responses
The move drew immediate criticism from several international entities. The European Union’s foreign policy chief stated that the court ruling was “regrettable,” citing the site’s historical significance as a bridge between cultures. Similarly, the World Council of Churches expressed disappointment, arguing that the conversion could foster divisions between religious communities.
Domestically, the government framed the decision as an exercise of national sovereignty. President Erdoğan described the reconversion as a “fulfillment of a historic right,” emphasizing that the Hagia Sophia remains a site accessible to both domestic and international tourists outside of prayer hours.
Current Operational Status
Since the 2020 decree, the Hagia Sophia has operated under the administration of the Diyanet. Visitors are required to adhere to specific dress codes and behavioral guidelines consistent with Islamic tradition. While the site remains a major tourist destination, the transition has necessitated ongoing management of visitor traffic and the preservation of Christian iconography.
The Turkish government has yet to announce any further changes to the site’s legal or administrative framework, and international heritage monitoring bodies continue to track the long-term impact of the reconversion on the structure’s historic fabric.
