# Hagia Sophia restoration and conservation > Live situation record from CLSTR: https://clstr.news/situations/hagia-sophia-restoration-and-conservation > Updated: 2026-09-10T09:38:53.000Z. Sources: 11. Developments: 2. The Hagia Sophia in Istanbul is a historical monument representing the architectural intersection of Christian and Islamic history. Originally a Byzantine cathedral commissioned by Emperor Justinian I, it was converted into a mosque following the Ottoman conquest in 1453. Recent developments involve a major restoration project at the Hagia Sophia Grand Mosque. Following advanced modeling and static analysis, experts identified a critical need to reinforce the eastern semi-dome, which is considered a vulnerable point in potential earthquake scenarios. This phase involves the installation of a steel working platform to allow for structural strengthening and the conservation of mosaics, calligraphy, and marble surfaces. To protect the site's historical integrity, specialized printed tarpaulins will be used to maintain visual continuity, and a multi-layered floor system will be implemented to protect the original 1,500-year-old marble flooring. Simultaneously, restoration efforts continue on the main dome, including mosaic conservation using ‘facing’ techniques and the installation of a temporary steel roof. The Ministry of Culture and Tourism has stated that these comprehensive works, overseen by a scientific committee, are being conducted according to a strict schedule to ensure the monument is preserved for future generations. Religious services and visitor access will continue through temporary arrangements, including the use of temporary mihrabs and minbars. ## Timeline ### 2026-09-10: Hagia Sophia begins structural reinforcement of eastern semi-dome Restoration at Hagia Sophia enters a new phase as experts begin structural reinforcement and conservation of the eastern semi-dome to protect the historic site against potential earthquake damage. 9 sources. https://clstr.news/cluster/hagia-sophia-begins-structural-reinforcement-of-eastern-semi-dome ### 2026-08-24: Hagia Sophia: Architectural intersection of Christianity and Islam The Hagia Sophia in Istanbul stands as a historic architectural blend of Byzantine and Ottoman influences, transitioning from a 6th-century cathedral to a mosque. 2 sources. https://clstr.news/cluster/hagia-sophia-architectural-intersection-of-christianity-and-islam --- Cite as: Hagia Sophia restoration and conservation. CLSTR, https://clstr.news/situations/hagia-sophia-restoration-and-conservation